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Distinguishing inter- and pangenerational food trends

Distinguishing inter- and pangenerational food trends daria.loginova@agroscope. admin.ch While food trends are usually described over an entire population, this paper suggests Socioeconomics, Agroscope, distinguishing between inter- and pangenerational food trends. To classify the food Tänikon 1, 8356 Ettenhausen, trends for the total population as inter- or pangenerational, we used disaggregated Switzerland household-based consumption data on 60 food categories over the period from 1990 to 2020 in Switzerland. We followed six different cohorts with a range of 10 birth years each and estimated robust trends for each generation and each product. Our results show that especially for meat, different generations follow different trends and form ‘intergenerational’ trends for the total population, whereas beans and peas would be an example of products with an increasing consumption for every single generation and a ‘pangenerational’ trend. Our study is the first to suggest distinguishing inter- and pangenerational food trends and to cover the most disaggregated available food con- sumption data in Switzerland for the period from 1990 to 2020. Managers and policy- makers should consider the mentioned differences in food consumption to mitigate errors in consumption projections, target consumers more effectively, and promote healthier food consumption. Keywords: Food, Consumption, Switzerland, Generation, Trend analysis Introduction The patterns of our food consumption are extremely relevant to our environmental foot - print (Oita et al. 2018; Jarmul et al. 2020; von Ow et al. 2020)—and they are in constant motion. The consumption of beverages in the USA (Duffey and Popkin 2007), fat fish in Norway (Trondsen et al. 2004) and fast food in Asia (Wu et al. 2021) is on the rise, and the opposite is the case for dairy products in France (Dubuisson et  al. 2010), yam and millet in Ghana (Wilhelmina et al. 2010) and traditional food among the Inuit (Hopping et al. 2010). With respect to environmentally more relevant trends, scientists welcome a growing trend of vegetarianism and veganism in the North (Tepper et al. 2022), whereas the environmental footprint in the Global South is still on the rise (Goldstein et al. 2016). However, the nature of these shifts in our diets, despite their high potential relevance (Kearney 2010), is only poorly understood. It is clear that diet changes are mostly caused by behavioural changes (Siega-Riz et al. 1998; Jahns et al. 2001; Smith et al. 2020), which distinguishes them from changes in energy demand (York 2007), for example, because © The Author(s) 2023. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the mate- rial. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http:// creativecommons.org/licenses/by/4.0/. Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 2 of 18 the latter are mostly caused by sociodemographic changes. However, it is unclear how these behavioural changes altering our food basket are caused. The change in people’s food choice shapes existing food systems. The trend is one of the simplest estimates of a change in behaviour, although we cannot argue that the food consumption of a 35-year-old person in 1990 is interrelated with the food consumption of a 35-year-old person in 2020. Nevertheless, studies have often measured consumption in age groups (see section ‘Food consumption trends and generations’) and assumed that the changes in consumption dynamics may happen in spite of possibly new behavioural patterns of new generations and generational replacement (e.g. Mori and Saegusa 2010; Arnaudova et al 2022; Baur et al 2022). The reason for the present study is the absence of any quantitative evidence for such differences between generations in the area of food choice and its dynamics. The knowledge about trends in food choice of different genera - tions may improve the forecasts of future food trends, which constitutes the importance of developing this knowledge. This paper compares the trends in food consumptions between generations and clas - sifies the total population trend as inter- or pangenerational trend. A theoretical frame - work that highlights the role of generations is presented in the ‘Food consumption trends and generations’ section. The ‘Materials and method ’ section describes the data and the method with which to check the theoretical concept. The ‘Results’ section presents and discusses the results, and the ‘Discussion and conclusions’ section provides conclusions. Food consumption trends and generations Theoretical framework The studies on food trends mentioned in the Introduction do rarely consider the behav - ioural differences between generations. We carried out an integrative review of literature (see, e.g. Snyder 2019) to collect the studies about food consumption over many genera- tions. As summarised in Table  1, the studies often discuss the mentioned behavioural differences in selected countries and regularly find a significance of age–period–cohort (APC) variables, although the models vary. The examples are a double-hurdle approach by Aristei et  al (2008) for Italy, a cohort analysis and seemingly unrelated regressions by Drescher and Roosen (2013) for Germany, probit, logit and APC models by Gus- tavsen and Rickertsen (2014, 2018a, 2018b) for Norway, APC models for Finland (Kähäri 2020, 2021), APC decompositions for Japan and Korea (Mori and Saegusa 2010; Mori and Stewart 2011; Mori et al. 2012; Mori 2021, 2022), a latent class analysis by Bezerra et al. (2018) for Brazilian adults, and the bulk of literature for the USA, where one can find Tobit models and their modifications (Blisard 2001; Harris and Blisard 2000, 2001; Stewart et  al 2012), cross-sectional approach (Christopher 2016), almost ideal demand system (Lee et al. 2020), as well as APC models for the widest range of foods and birth cohorts (Beatty et  al. 2013). These studies assigned generations to individuals, found the significance of the APC variables and did expectations about the future behaviour of generations. None of these studies estimated, compared and classified food trends between generations, which allows us to stress the novelty of our research question com- pared to the existing literature. In addition to the novelty of the research question, there is a need to select the appro- priate way to define generations, at least for modelling purposes. Some previous studies M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 3 of 18 Table 1 The coverage of previous studies on food consumption between generations Products Period 1–19 years 20–29 years 30 years and more a d One type of food Aristei et al (2008) and Gus- Gustavsen and Rickertsen Mori (2021, 2022) , tavsen and Rickertsen (2014) (2018b), Gustavsen et al Mori et al (2012) (2014), Lee et al (2020) , Mori and Stewart et al and Saegusa (2010) and Stew- (2012) art and Blisard (2008) Many types of food Bezerra et al. (2018), Blisard Gustavsen and Rickertsen Beatty et al (2013), b b (2001) , Harris and Blisard (2018a), Mori and Stewart Kähäri (2021) and b e d (2000, 2001) and Vaterlaus (2011) and Otsuka et al (2014) Schmeling (2014) et al. (2015) Specific intake Yang (2020) – Christopher (2016); Kähäri (2020) Food away from/at home Teisl et al (2016) Drescher and Roosen (2013); – Zan and Fan (2010) The generations are defined as a 10-year age–period–cohort, if other is not mentioned. Only meat (even of many types, incl. fish), only fruit and their variety, only milk, only non-alcoholic beverages, etc. Generation is defined on 5-year intervals Generations are defined historically Only a certain cohort studied Fruits in Japan, rice in Korea defined the generation by the age of a head of a household that may distort the genera - tional effects in households with members from various generations. The period of one generation also varies between the studies from 5 to 10-year birth interval. There are also studies that assign generations as it is historically common (e.g. ‘Baby Boomers’, ‘X’, ‘Y’), so that the length of the studied periods may differ even within one study. There are also definitions that are relevant only for selected countries, conditions and societies (e.g. Interbellum generation, MTV generation, Sandwich generation, The Boomerang Generation). These perspectives neglect, in a way, the impact of age. It competes with the perspective that food demand changes over the course of life, a well-documented perspective (Cortez and Senauer 1996; Jho 1999; Zhong et al 2012; Bilgic and Yen 2013). However, it is the merit of the approach centred on generations that the evolution of val- ues and tastes in societies can better be taken into account. Section "Generations" shows the way to avoid the mentioned issues in defining generations, albeit using more data. Studies with population data on consumption and age across at least a 20-year period of time could potentially predict a 10-year trend line for available products. However, to the best of our knowledge, a few studies had enough data for such quantitative exercise for many foods, and those studies did not focus on distinguishing food trends for many product types. The entire literature, however, somehow neglects to systematically take into account that some societal trends emerge because the young generation behaves differently from the old one. This simple principle, while being well documented by political scientists (Rodrigo and Torreblanca 2001; Breen 2014), has not been given suf- ficient attention when looking at food trends. In Switzerland, the trends in food consumption are covered by Swiss statistics (FSO 2022; FSVO 2021, 2019; FCN 2018) and researchers (e.g. de Abreu et al 2014; Dumont et  al 2017), albeit not in a generational perspective. The studies report that more and more young people from urban areas are giving up eating meat and this situation is Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 4 of 18 expected to continue in the future. In a regional case study (Schneid Schuh et al. 2018), the adult population slightly improved compliance with the Swiss dietary guidelines over time, while the provision of dietary guidelines did not impact these trends. With regard to many disaggregated foods, the situation is even less clear, because most studies cover only a specific product or dietary unit and analyse less than a 10-year period. The importance of distinguishing inter‑ and pangenerational food trends If the young generation behaves differently from the old one, then the compared genera - tional trends would have different shapes, otherwise the consumption dynamics would be similar. Having this in mind, we suggest that food trends can be distinguished into inter- and pangenerational trends. Therefore, defining intergenerational and pangen - erational food trends is the first contribution of this study. Pangenerational trends are simpler in their essence, because we define that they are shaped by the same dynamics (increasing or decreasing consumption) across all generations, slightly adapting the use of the term ‘pangenerational’ by Maxwell and Broadbridge (2014). Therefore, the prod - uct consumption trend for the total population is pangenerational, if trends of product consumption for all studied generations have the same sign. If the negative (positive) trend for product consumption was pangenerational, it would mean that the overall negative (positive) trend is significantly negative (positive) for each age group. If some generations had a positive and others a negative trend, the overall pattern would be intergenerational (borrowing the term from Meyer 2017). In our opinion, there are two reasons giving importance to the distinction. One, the distinction between pan- and intergenerational food trends is potentially important for marketing strategists. It is key for producers and retailers to find out to which target group they should tailor their promotional activities (Reutterer et  al. 2006; Camilleri 2018). For example, if the decline in food consumption prevailed despite an increasing consumption by elder segments, it would certainly be advantageous to focus on these elder segments when promoting this food. Two, scientists who are interested in con- sumption forecasts will find support in the distinction between the two categories of demand trends. If a negative trend, for example, is shaped by elder consumers, while the youngest generation increases their consumption, it is unlikely that the negative trend is going to be a long-term trend because the older generation will die out over time. One field where intergenerational food trends may be particularly important may be meat consumption. It is well known that young people are more open to vegetarian diets than older generations are (Stoll-Kleemann and Schmidt 2017; Nery do Carmo, 2019; Giacoman et al. 2021). As previous literature did not address trends between gen- erations, we cover this research gap and hypothesise that the share of intergenerational trends is higher for meat products than for other products. Materials and method Data For two reasons, Switzerland is a suitable case study to test our hypothesis and to illus- trate the different categories of food trends. Owing to the country’s high level of wealth and good trade relations, food availability is almost unlimited so that shifts in consump- tion are mostly demand rather than supply-driven. In addition, there are good databases M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 5 of 18 available for Swiss consumers that, in the past, have enabled a number of empirical and research studies on consumption patterns (Aepli and Finger 2013; Götze and Mann 2015; Götze et al. 2016; Sahakian et al. 2020). We used disaggregated agent-based data issued by the Swiss Federal Statistical Office for the years 1990 and 2000–2017 for 6–12 thousand random participants of the sur- vey (households of Switzerland) each year. The procedure of data collection is a random sample of households in Switzerland who report their household’s characteristics and food purchasing diaries. Therefore, the data we used are the result of a reliable ran - domised observational survey. The processing of the conducted survey was the same each time, but there were major changes in the period of the survey, the product cat- egories and the households’ characteristics declared across the years. The data in 2006– 2017 specified the yearly information about the households’ respondents and average monthly consumed volumes and expenditures of 105 foods for each household. The data in 1990 and 2000–2005 specified similar information, but the households and foods were described in less detail. The nulls for the households that declared zero consump - tion were recorded in the data and were considered in all estimations of the present paper. The average consumption volumes may differ from reported ones in food statis - tics because households’ food diaries contain only food purchases of the households, not food consumption in restaurants or canteens. As we aimed at studying trends, we needed to scale the data over time and genera- tions using only the most reliable data. Therefore, we used only the data of 1990, 2000, 2010 and 2017 to define the trends in food consumption. We used the data of 2017 to approximate the data for 2020 because the latter were not available in 2023 and the con- sumption might have been distorted by the Corona crisis. Because of food classifications (product categories) mismatch across the years, we aggregated several food categories into more general food categories that corresponded by meaning. Therefore, compared with official statistics, the food categories in the present study appear to be more gen - eral over the years for the least stable food categories, such as non-alcoholic drinks. We defined 49 main foods that matched precisely across all years, accurately grouped the remaining categories into more general food categories, and studied 60 food categories in total. These aggregations allowed us to avoid a major reduction in the data. Generations In this study, we defined a generation as all people of a certain age in all households in the corresponding year (see Table  2). Following the data availability, we started defin - ing generations in 1990, allocating a 10-year period to each generation. Therefore, the first generation was 75 and older in 1990, the second was 65–74 years old, the third was 55–64 and so on until the seventh generation, aged 15–24  years old in 1990. In 2000, that is 10 years later, the seventh generation changed its age from 15–24 to 25–34, and first observations on consumption were available for the eighth generation, then aged 15–24. Therefore, the seventh generation was assigned to the age group 15–24 in 1990, 25–34 in 2000, 35–44 in 2010 and 45–54 in 2020. The same logic was applied to other generations. If all participants of the household were in the same generation according to Table  2, the household was assigned to this generation, i.e. generations were assigned to singles Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 6 of 18 Table 2 The age (birth years) of generations 1–10 Age (years) 1990 2000 2010 2020 15–24 7 (1966–1975) 8 (1976–1985) 9 (1986–1995) 10 (1996–2005) 25–34 6 (1956–1965) 7 (1966–1975) 8 (1976–1985) 9 (1986–1995) 35–44 5 (1946–1955) 6 (1956–1965) 7 (1966–1975) 8 (1976–1985) 45–54 4 (1936–1945) 5 (1946–1955) 6 (1956–1965) 7 (1966–1975) 55–64 3 (1926–1935) 4 (1936–1945) 5 (1946–1955) 6 (1956–1965) 65–74 2 (1916–1925) 3 (1926–1935) 4 (1936–1945) 5 (1946–1955) 75 and older 1 (1900–1915) 2 (1916–1925) 3 (1926–1935) 4 (1936–1945) and to households with people of similar age, which is more precise than defining the generation by a generation of a household head, but considerably reduces the number of households assigned to generations. Therefore, we introduced two more categories. First, we allocated families with children into a separate category. Second, we defined a group of ‘mixed’ generations if the household had no children younger than 15 years old but the age difference between the participants did not allow allocating them to one generation. We excluded households with children and the group of ‘mixed’ generations from the generation classification but considered their observations separately and in the total population group. As a result, we obtained 6 groups with 4 sets of observa- tions for trend analysis (generations 4–7, ‘families with children’ and ‘mixed’), 2 genera- tions with 3 sets of observations (generations 3 and 8) and 2 generations with only 2 sets of observations to study (generations 2 and 9). We assumed a certain homogeneity of agents within each generation over time. We precisely analysed generations 3–8 and compared the results with the estimations performed for all available data. We chose this rationale, because if we had followed people in the same age cohort over years, then the observations for each food trend would have included people from several genera- tions over time. The information on the age and generation of the participants in the households and the information on the households’ population and food consumption were merged for further analysis. In total, our analysis included 1.3 million observations representing consumption volumes per person for 60 comparable food categories in the households for the years 1990, 2000, 2010 and 2020. Method In this study, we grouped households in 10-year cohorts into generations and followed them comparing their reported eating behaviour for changes. Further, for each food, we compared the revealed trends between different generations to give a final charac - teristic for a trend for the total population. We aimed to estimate the trends in Swiss food consumption over the period from 1990 until 2020 and to check if the share of intergenerational trends was higher among animal products than among crop products. For this purpose, we applied a trend analysis. Thereby, we compared the consumption trends between the foods and generations in Switzerland, classified the products accord - ing to the trend type and discovered the correlation of the trend type with a product type. Household consumption comparisons can be difficult because the number of M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 7 of 18 participants differs between the households. However, under the assumption that the households assigned to the same generation in Switzerland were homogeneous and the people in these households would, on average, have similar consumption patterns, the consumption volumes per person served as an identifier of average consumption, which is comparable between households. In addition, we assume that the age effects are included in the generational trends. We expected these assumptions to hold for all observations within generations. Formally, for each food i and generation j at time t , we had the observations in the households h and defined c —the consumption (in grams per person)—and the i,j,t ,h slopes of the consumption trends β and β . We obtained the estimates of the trends in i,j i consumption per person β and β , using the following simple regressions: i,j i For generation j : c = α + β t + ε , i,j,t,h i,j i,j i,j,t,h (1) For total population: c = α + β t +˜ε , i,t,h i i i,t,h (2) where α and α are constants and ε and  ε are the error terms. Therefore, the i,j i i,j,t ,h i,t ,h trends in our study are measured by regressing the variable of interest on a time vari- able. This is a common procedure, albeit we have many observations at the same point of time. By definition, the time trend can be built for 3 periods and more; for 2 periods one can only define the growth or decline. That is why the trend was possible to define and built only for generations 3–8, ‘mixed’ generation households and households with chil- dren, because all of them were observed over 3–4 periods. For our research purposes, more points would be beneficial, but were not available. Our data did not allow various methods of dynamic investigation. For each food i , we classify the trend β as. • intergenerational if at least two of β have significant opposite signs; i,j • pangenerational if all β have the same and significant sign; i,j • weakly pangenerational if the sign is the same among significant β . i,j Furthermore, we defined s—the dummy variable for the type of the trend, where s equals 1 if is intergenerational and 0 if it is pangenerational or weakly pangenerational. We explained the type of the trend with p—the dummy variable for a food type, where p equals 1 if the food i is meat and 0 otherwise. We used 59 observations for discovering the relation of a binary trend type with a binary food type (we dropped the mixed food category ‘Oils and fats’). We denoted the relation between s and p as δ and assessed it by using correlation analysis, the Rogers–Tanimoto measure (see more in Zhang and Sri- hari 2003), robust linear regression (with and without the constant, using the ‘felm’ func- tion of the ‘lfe’ R package by Gaure 2020) and a logit model (‘glm’ function of the ‘stats’ R package). More details on the applied methods may be found in Wooldridge (2013). The estimates for β , β and δ(i.e. β , β and δ ) and their significance were the inter - i,j i i,j i est of the present study. A zero or insignificant estimate β would mean that we have i,j no evidence that food consumption changed over time for the defined generation j and food i . Similarly, a zero or insignificant estimate δ would mean that food con- sumption trend types did not correlate with a type of food. We expected a variety of Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 8 of 18 trend types across foods. Equation  1 is also applied to households with children and to a group of ‘mixed’ generation households. Results Descriptive evidence Figure 1 shows the descriptive results for four selected food categories, revealing that the distinction between pangenerational and intergenerational trends is a meaning- ful one. The trends for eating beans and peas and for drinking milk show very similar patterns over all generations, albeit in different directions, and can therefore be con - sidered as pangenerational. The fact that the global demand for protein crops such as beans and peas is rising, mostly for feed purposes but partly also for meat substitution, is increasingly receiv- ing attention (Schaack et  al. 2014; McGill et  al. 2019), and no generation in Switzer- land is an exception to this trend. While the global demand for milk is also on the rise (Adesogan and Dahl 2020), Swiss consumers throughout all generations consume less milk than they used to, with the sharpest decline in the 1990s. This is also a well- documented trend (Statista Research Department 2020). The demand patterns in the bottom part of the figure look more complex and are examples of intergenerational patterns. While Swiss consumers in total follow the global trend of increasing poultry consumption (Bryan and Classen 2020), Fig.  1 shows that this trend is merely driven by the middle generations. Neither the very young nor the very old generations have increased their poultry consumption. The trend for sheep and goat meat is also very heterogeneous. Here, it seems that meat is increasingly attractive to young people but not to older generations, who have reduced their consumption. Fig. 1 Examples of two pangenerational and two intergenerational food trends M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 9 of 18 Heterogeneity of food consumption trends between generations The econometric analysis for quantitative evidence on the heterogeneity of food con - sumption trends between generations is presented in Table  3. The consumptions of most fresh vegetables and fruits and of flagship foods (in Switzerland, these are choco - late, cheese and curd) have a pangenerational trend. Among non-animal-based foods, which form more than half of the studied product list, only citrus fruits and mush- rooms have intergenerational trends. For citrus fruits, the slope turns from strongly negative among the oldest generation to strongly positive among the youngest. The trends for mushrooms are less significant, and such a gradient is less transparent. The consumption trends for 7 of the 11 studied meat products are intergenerational. The exceptions are poultry, ham and bacon, horse meat and canned meat. The 6th and the 7th generations tend to consume more poultry over time, the older (3rd, 4th and 5th) generations—less horse, wild and rabbit meat. We found intergenerational trends for 15 of the 60 studied products. For dairy products, there is no product that has an intergenerational trend, i.e. most trends are pangenerational. In the case of flour, generations have positive trends, but the total trend is negative because of negative trends in mixed households and households with children. The 8th generation stands apart from other generations with insignificant trends for banana, butter, coffee, potatoes, non-alcoholic drinks, spirits, and yoghurt consump - tion, supporting earlier observations on behavioural differences between the youngest and older generations. Our estimations demonstrate that these behavioural differ - ences can also be observed concerning at least these seven food preferences. Among households with children, the products with intergenerational trend (except jam) have negative trends over time, whereas the trends for the foods with pangen- erational trends correspond to those of other generations and the total population. Households with children in Switzerland have decreased the consumption of most meat (the exceptions are poultry and canned meat), dairy (except cheese), bread, wines, potatoes, roots, tomatoes, and vegetables (leafy, fruit, and stem), but have increased the consumption of bananas, grapes, lemons, pears and quinces, pasta, cab- bage, canned vegetables, dried crops, and prepared fish and seafood. The type of the trend and the type of the food We used the information on the trend type from Table  3 and the belonging of the foods to meat products to provide precise quantitative evidence for the relations between the type of the trend and the type of the food. The results of these estima - tions are presented in Table 4. The correlation between the trend type and food type is 0.44; the Rogers–Tanimoto measure is 0.5. Both measures indicate an interdependency of trend type and food type, although this interdependency is not strong. However, the one-factor models show that the dummy on meat product is significant as a single factor influencing the trend type in both linear regressions (with and without constant) and the logit model. Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 10 of 18 Table 3 The yearly trends in food consumption per person between generations and foods Food Trends in food consumption β β i,j i j = 3 j = 4 j = 5 j = 6 j = 7 j = 8 Households Mixed households All Trend type [1926–1935] [1936–1945] [1946–1955] [1956–1965] [1966–1975] [1976–1985] with children Meat Beef − 27 (2)*** − 12 (2)*** − 1 (2) 2 (1) 5 (2)** 5 (3) − 7 (1)*** − 11 (1)*** − 7 (0)*** Inter Ham and bacon 2 (2) 1 (1) 3 (1)** 4 (1)*** 4 (1)*** 0 (2) − 1 (0)** − 2 (1)*** − 1 (0)** Horse meat − 1 (0)* − 1 (0)*** − 1 (0)** 0 (0) 0 (0) 0 (0). − 1 (0)*** − 1 (0)*** − 1 (0)*** Pork − 14 (3)*** − 6 (2)** 0 (2) 0 (1) 5 (2)* 3 (3) − 9 (1)*** − 5 (1)*** − 6 (0)*** Inter Poultry − 4 (3) − 1 (2) 4 (2). 5 (2)** 8 (2)*** − 5 (5) 7 (1)*** 6 (1)*** 5 (1)*** Sausages − 17 (3)*** − 4 (2)* 1 (2) 7 (2)*** 3 (2) 0 (5) − 8 (1)*** − 10 (1)*** − 8 (0)*** Inter Sheep meat and goat meat − 2 (1)** − 1 (1)* 1 (1)* 1 (0)* 1 (0)** 1 (1) − 1 (0)*** − 1 (0)* 0 (0)** Inter Veal − 5 (1)** − 3 (1)** 1 (1) 1 (1)* 0 (0) − 2 (1). − 1 (0)*** − 4 (0)*** − 2 (0)*** Inter Wild and rabbit meat − 5 (1)*** − 2 (0)*** − 1 (0)* 1 (0). 0 (0) 0 (0) − 2 (0)*** − 2 (0)*** − 2 (0)*** Inter Canned meat 1 (1). 0 (1) 1 (1) 1 (1) − 1 (1) 0 (0)** 0 (0) 0 (0) Other meat − 16 (2)*** − 10 (1)*** − 7 (1)*** − 6 (1)*** − 7 (2)*** 6 (3)* − 9 (1)*** − 8 (1)*** − 8 (0)*** Inter Fish Fish − 4 (2)* − 2 (1). 0 (1) 2 (1)* 5 (1)*** 3 (2) − 2 (0)*** − 1 (1) − 1 (0)*** Inter Seafood 1 (1) 0 (1) 2 (1)** 1 (1) 0 (1) − 1 (0)** 0 (0) 0 (0) Fish and seafood prepared 5 (1)*** 3 (1)*** 4 (1)*** 3 (0)*** 2 (0)*** 3 (2). 4 (0)*** 4 (0)*** 4 (0)*** Pan Dairy, margarine and egg Milk − 259 (22)*** − 112 (13)*** − 81 (11)*** − 110 (8)*** − 89 (11)*** − 49 (28). − 242 (5)*** − 188 (6)*** − 190 (3)*** Pan Cream − 24 (2)*** − 17 (1)*** − 13 (1)*** − 11 (1)*** − 2 (2) − 1 (3) − 11 (0)*** − 15 (1)*** − 13 (0)*** Yoghurt − 43 (4)*** − 38 (3)*** − 36 (4)*** − 43 (3)*** − 34 (5)*** − 5 (10) − 28 (1)*** − 31 (2)*** − 30 (1)*** Butter − 14 (1)*** − 12 (1)*** − 8 (1)*** − 7 (0)*** − 6 (1)*** 0 (2) − 10 (0)*** − 13 (0)*** − 11 (0)*** Cheese and curd 42 (6)*** 54 (5)*** 64 (4)*** 58 (4)*** 68 (5)*** 36 (11)** 37 (2)*** 47 (2)*** 48 (1)*** Pan Margarine − 9 (1)*** − 6 (0)*** − 4 (0)*** − 5 (0)*** − 4 (0)*** − 3 (1)*** − 6 (0)*** − 6 (0)*** − 6 (0)*** Pan Egg 9 (2)*** 7 (2)*** 6 (2)** 3 (1). 1 (1) 2 (1)* 2 (0)*** Pan M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 11 of 18 Table 3 (continued) Food Trends in food consumption β β i,j i j = 3 j = 4 j = 5 j = 6 j = 7 j = 8 Households Mixed households All Trend type [1926–1935] [1936–1945] [1946–1955] [1956–1965] [1966–1975] [1976–1985] with children Vegetables, mushrooms, roots Beans and peas 13 (3)*** 23 (3)*** 35 (2)*** 34 (2)*** 36 (3)*** 41 (8)*** 26 (1)*** 30 (2)*** 28 (1)*** Pan Cabbage vegetables 14 (4)** 20 (4)*** 29 (4)*** 32 (4)*** 20 (5)*** 13 (1)*** 20 (2)*** 19 (1)*** Pan Leafy vegetables − 43 (3)*** − 33 (2)*** − 21 (2)*** − 19 (1)*** − 13 (2)*** − 12 (5)* − 27 (1)*** − 32 (1)*** − 28 (0)*** Pan Mushrooms fresh − 1 (0)** − 1 (0)* − 1 (0)*** − 1 (0)** 0 (0) 2 (1). − 1 (0)*** − 1 (0)*** − 1 (0)*** Inter Onions and garlic 47 (5)*** 42 (3)*** 47 (3)*** 45 (3)*** 43 (3)*** 34 (7)*** 30 (1)*** 36 (2)*** 36 (1)*** Pan Potatoes − 127 (27)*** − 80 (13)*** − 46 (6)*** − 15 (7)* − 10 (5)* − 13 (8) − 36 (3)*** − 42 (5)*** − 44 (2)*** Root vegetables − 36 (3)*** − 29 (2)*** − 24 (2)*** − 16 (1)*** − 11 (1)*** − 17 (4)*** − 24 (1)*** − 24 (1)*** − 23 (0)*** Pan Stem and fruit vegetables − 25 (2)*** − 11 (2)*** − 7 (2)*** 2 (2) − 14 (1)*** − 15 (1)*** − 14 (1)*** Tomatoes − 31 (4)*** − 18 (3)*** − 17 (2)*** − 18 (1)*** − 12 (1)*** − 21 (5)*** − 14 (1)*** − 18 (1)*** − 17 (0)*** Pan Canned vegetables and mushrooms 80 (9)*** 51 (7)*** 40 (7)*** 24 (6)*** 6 (7) 27 (3)*** 36 (4)*** 35 (2)*** Dried vegetables and mushrooms 20 (2)*** 23 (2)*** 21 (1)*** 27 (2)*** 17 (2)*** 15 (4)** 18 (1)*** 22 (1)*** 21 (0)*** Pan Fruits Apples − 90 (10)*** − 50 (4)*** − 29 (3)*** − 29 (2)*** − 29 (3)*** − 21 (6)*** − 41 (1)*** − 46 (2)*** − 47 (1)*** Pan Bananas 26 (7)*** 29 (4)*** 23 (4)*** 13 (3)*** 13 (3)*** 9 (11) 5 (1)*** 8 (2)*** 11 (1)*** Berries 12 (4)** 6 (2)** 12 (2)*** 7 (1)*** 9 (2)*** 8 (4)* 0 (1) 1 (1) 3 (0)*** Pan Citrus (except lemons) − 52 (7)*** − 17 (5)** − 10 (4)* − 6 (3)* 1 (4) 20 (9)* − 12 (1)*** − 17 (2)*** − 15 (1)*** Inter Grapes − 4 (5) − 3 (3) 0 (2) 10 (2)*** 10 (3)*** 4 (7) 3 (1)** 2 (1) 2 (1)** Lemons 60 (8)*** 55 (5)*** 57 (5)*** 49 (4)*** 35 (5)*** 25 (9)** 23 (1)*** 38 (2)*** 37 (1)*** Pan Nuts − 4 (2)** 1 (2) − 3 (2)* − 3 (1)* − 1 (2) − 4 (0)*** − 1 (1)* − 2 (0)*** Pears and quinces 30 (7)*** 43 (5)*** 39 (4)*** 30 (3)*** 31 (3)*** 13 (6)* 14 (1)*** 26 (2)*** 25 (1)*** Pan Stone fruits − 22 (6)*** − 7 (4). − 8 (3)** − 5 (2)* 2 (2) − 12 (13) − 8 (1)*** − 17 (2)*** − 12 (1)*** Dried fruits − 2 (1) − 1 (1) − 1 (1) 3 (1)*** 0 (1) 2 (0)*** 1 (0)* 1 (0)*** Other fruits − 2 (4) 4 (3) 9 (3)*** 7 (2)** 16 (4)*** 29 (9)** − 5 (1)*** 6 (2)*** 4 (1)*** Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 12 of 18 Table 3 (continued) Food Trends in food consumption β β i,j i j = 3 j = 4 j = 5 j = 6 j = 7 j = 8 Households Mixed households All Trend type [1926–1935] [1936–1945] [1946–1955] [1956–1965] [1966–1975] [1976–1985] with children Cereal products Bread − 56 (7)*** − 20 (5)*** − 1 (4) − 3 (3) − 5 (5) − 8 (11) − 34 (2)*** − 37 (2)*** − 29 (1)*** Flours 1 (6) 6 (4) 6 (2)** 5 (2)* 3 (2). 17 (12) − 4 (1)*** − 3 (1)** − 2 (1)** Pasta − 1 (3) 4 (3). 7 (2)** 11 (2)*** 8 (3)** − 8 (8) 12 (1)*** 9 (1)*** 9 (1)*** Rice − 3 (2) − 5 (2)** − 1 (1) 2 (1) − 5 (1)*** 5 (5) 2 (1) 1 (1) 0 (0) Coffee, tea and sweets Cocoa and chocolate 14 (4)*** 25 (3)*** 20 (3)*** 17 (3)*** 16 (2)*** 24 (2)*** 21 (1)*** Pan Coffee and substitutes − 26 (3)*** − 21 (2)*** − 17 (2)*** − 9 (1)*** − 6 (1)*** 0 (3) − 7 (0)*** − 12 (1)*** − 11 (0)*** Honey − 8 (3)** − 1 (2) 3 (1)* 5 (1)*** 7 (2)*** 24 (4)*** − 1 (0)** 1 (1) 1 (0) Inter Jam 2 (1)* 2 (1)* − 1 (0). 1 (0)** 0 (1) − 6 (2)** 1 (0)*** 1 (0)** 1 (0)*** Inter Sugar − 25 (5)*** − 9 (2)*** 0 (1) − 2 (1) − 1 (1) − 3 (3) − 11 (1)*** − 18 (1)*** − 14 (1)*** Tea and herbs 0 (1) − 1 (0)** − 1 (0)* − 1 (0)*** − 2 (0)*** − 5 (1)*** 0 (0) 0 (0). − 1 (0)*** Liquids Beer − 41 (11)*** − 49 (12)*** − 47 (12)*** 14 (9) 50 (14)*** 42 (23). − 3 (3) 14 (6)* 5 (3). Inter Mineral water − 267 (28)*** − 176 (35)*** − 59 (41) − 57 (36) − 48 (60) − 19 (13) − 132 (19)*** − 90 (9)*** Non-alcoholic drinks − 236 (49)*** − 147 (32)*** − 111 (28)*** − 106 (26)*** − 81 (47). − 35 (66) − 172 (10)*** − 156 (17)*** − 130 (8)*** Olive oil 11 (2)*** 6 (1)*** 7 (1)*** 8 (1)*** 3 (1)*** 11 (6). 7 (0)*** 8 (1)*** 7 (0)*** Pan Spirits and liqueurs 16 (5)** 11 (3)*** 11 (3)*** 5 (2)*** 4 (1)** − 2 (2) 2 (0)*** 3 (1)*** 5 (0)*** Wines − 32 (19). − 24 (14). 9 (15) 38 (9)*** 89 (16)*** − 9 (17) − 14 (3)*** 3 (6) 5 (3). Inter Oils and fats (except olive oil) − 14 (3)*** 0 (2) 5 (2)** 6 (1)*** 9 (2)*** 8 (3)* − 5 (1)*** − 3 (1)** − 2 (0)*** Inter Significance codes: ‘***’ = p ≤ 0.001; ‘**’ = p ≤ 0.01; ‘*’ = p ≤ 0.05; ‘.’ = p ≤ 0.1. Values in round brackets are standard errors. Values in square brackets are years of birth. All estimations are done in grams, except ‘Liquids’ and ‘Milk’, which are measured in millilitres. The empty cells in trend type mean a weakly pangenerational trend. Denotes the foods that had no data in 1990 M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 13 of 18 Table 4 The Relation between Trend Type and Food Type Type of measure Correlation 0.44 Rogers–Tanimoto 0.504 Linear regression with a constant 0.44(0.14)** Linear regression without a constant 0.57(0.13)*** Logit model 2.16(0.70)** Significance codes: ‘***’ = p ≤ 0.001; ‘**’ = p ≤ 0.01; ‘*’ = p ≤ 0.05; ‘.’ = p ≤ 0.1. Values in brackets are standard errors. The Rogers–Tanimoto measure was calculated with the ‘rogersTanimoto’ function of the ‘partitionComparison’ R package. Trend type dummy is defined as 1 if the trend is intergenerational and 0 otherwise. Food type dummy is defined as 1 if the food is meat and 0 otherwise Limitations The analysis has its limitation, in particular with regard to the quality of the data. It is based on household data, so that a lot of data, namely consumption in households that stretched over several generations, could not be utilised. This ‘selection bias’ may have distorted the results, and similar analyses with individual consumption datasets that are available over a long period might produce results that are more reliable. Such datasets may also be used for developing food trend forecasts taking the distinction between pan- and intergenerational trends into account. The second limitation of our study is a territorial and time coverage, as well as the fact that many factors stayed beyond the scope of our study, because we aimed at only quantifying and classifying the food trends between generations. There- fore, the literature for different time frames and territories could have been only partially integrated with our research, as our research focussed on Swiss food markets in 1990–2020. In addition to traditional factors such as income and gen- der, it would have been useful to consider institutional factors in future studies, for example, transitions in 2008–2009 and 2014–2015 (Loginova and Mann 2022a) and Corona-related transitions in 2020–2021, that predefined a period of new institu- tions starting in 2022. In this study, we attempted to avoid the years characterised by transition-related distortions and used only the data of 1990, 2000, 2010 and 2017 (to approximate the data for 2020). When more data are available over time, it would make sense to take institutional, economic and biological waves into account (Loginova and Mann 2022b), because having no data before 1990, we know very few about the eating of generations living in periods before. That means also that trends in the period 1990–2020 describe only a small part of their lives, that is relevant for only the last 30 years. In addition, the people in the oldest generation represent only a longest-living part of the society they lived in. Mirroring this, the youngest generations represent all the young people, including those whose consumption will not allow to change their age in the future 10-year periods. To the best of our knowl- edge, this selection bias has no solution so far, except randomising the choice of peo- ple (households) studied. We, however, did not perform this approach in our study ourselves, because our data were initially a result of a randomised survey from a reliable source. Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 14 of 18 Discussion and conclusions The significance of the explanatories and nonzero estimations of interdependencies allow us to confirm that (1) the distinction between pangenerational and intergenera - tional trends is a meaningful one, (2) the share of intergenerational trends is higher among animal products in general and meat products in particular, and (3) the type of food is significant for a trend type. However, the negative trend of meat consumption in our sample has been formed rather by older generations and families with children than by younger generations. This may be explained by the fact that the data we used in the study do not cover people under 35 years old in 2020, the very generation likely to follow vegan or vegetarian diets. Since, obviously, longer panel data by the young- est generation is not available, future work that finds solutions for this problem would be desirable. Knowing how the consumption of the youngest generation is evolving within a country could provide important marketing and policy outlets, as well as theoretical ones. Our descriptive and the econometric analyses have shown that different types of food trends exist. For the slight majority of trends, there are no major behavioural differences between generations, a pattern that we called pangenerational. However, especially for a number of food items for which the overall demand is declining over time, the genera- tional patterns differ from each other, a situation that we described as intergenerational. The demand for citrus fruits, for example, rises for the young generations, while—in accordance with the overall negative trend—elder people decrease their consumption. This pattern matters because it implies that the negative trend of citrus fruit demand in the past is unlikely to be continued in the future and will require a change in marketing and policymaking. Generational analysis is used in marketing (Rentz and Reynolds 1991) for which our new distinction may have significant impacts. Promotion teams may consider negative pangenerational trends as an unavoidable loss of consumers, positive pangenerational trends as an opportunity to conduct age-independent promotions and intergenerational trends as the chance to target the most sensitive or a highly potential age group. The same applies to policymakers who may want to foster pro-social nutritional behaviour like the reduction in meat consumption. The products with intergenerational trends are usually consumed less by older genera - tions and more by younger generations (e.g. beef, beer, citrus, fish, honey, mushrooms, pork, sausages, sheep and goat meat, wild and rabbit meat). Therefore, for the majority of the products with intergenerational negative trends, this trend is driven by older gen- erations and may receive a positive impulse in future if younger generations continue their current diet trends. The distinction between inter- and pangenerational trends has the potential to make forecasts on food trends more precise and to improve marketing and promotional activi- ties. The results have shown that projections on meat consumption require the use of age-related information and contribute to the growing evidence on predicting food and meat consumption (e.g. Zeng et al. 2019; Van Dijk et al 2021; Hassoun et al 2022). As the relevance of food trends for public health and the environment can hardly be overesti- mated, it is worthwhile to explore the nature of these food trends in more depth, gener- ating useful results for both managers in the food industry and policymakers. M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 15 of 18 Acknowledgements The authors thank anonymous reviewers for their constructive comments on an earlier draft. Author contributions DL was responsible for software, data curation, validation and analysis. SM performed conceptualisation, supervision, reviewing, and was a major contributor in writing the manuscript. Both authors read and approved the final manuscript. Authors’ information Stefan Mann: Dr. rer. pol. Dr. sc. agr. habil., Prof., The leader of Socioeconomics research group, Research Division Competi- tiveness and System Evaluation, Research Station Agroscope, Federal Office of Economics. Address: Tanikon 1, CH-8356 Ettenhausen, Switzerland. Daria Loginova: Dr. rer. pol., Post-Doc, Department Socioeconomics, Research Division Competitiveness and System Eval- uation, Research Station Agroscope, Federal Office of Economics. Address: Tanikon 1, CH-8356 Ettenhausen, Switzerland. Funding This work was supported by Agroscope. Availability of data and materials The datasets used and analysed during the current study are available from the corresponding author upon reasonable request. Declarations Competing interests The authors have no conflicts of interest to declare. Received: 4 January 2023 Revised: 7 February 2023 Accepted: 21 March 2023 References Adesogan AT, Dahl GE (2020) MILK Symposium Introduction: dairy production in developing countries. J Dairy Sci 103(11):9677–9680. https:// doi. org/ 10. 3168/ jds. 2020- 18313 Aepli M, Finger R (2013) Determinants of sheep and goat meat consumption in Switzerland. Agric Food Econ. https:// doi. org/ 10. 1186/ 2193- 7532-1- 11 Aristei D, Perali F, Pieroni L (2008) Cohort, age and time effects in alcohol consumption by Italian households: a double- hurdle approach. 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Distinguishing inter- and pangenerational food trends

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daria.loginova@agroscope. admin.ch While food trends are usually described over an entire population, this paper suggests Socioeconomics, Agroscope, distinguishing between inter- and pangenerational food trends. To classify the food Tänikon 1, 8356 Ettenhausen, trends for the total population as inter- or pangenerational, we used disaggregated Switzerland household-based consumption data on 60 food categories over the period from 1990 to 2020 in Switzerland. We followed six different cohorts with a range of 10 birth years each and estimated robust trends for each generation and each product. Our results show that especially for meat, different generations follow different trends and form ‘intergenerational’ trends for the total population, whereas beans and peas would be an example of products with an increasing consumption for every single generation and a ‘pangenerational’ trend. Our study is the first to suggest distinguishing inter- and pangenerational food trends and to cover the most disaggregated available food con- sumption data in Switzerland for the period from 1990 to 2020. Managers and policy- makers should consider the mentioned differences in food consumption to mitigate errors in consumption projections, target consumers more effectively, and promote healthier food consumption. Keywords: Food, Consumption, Switzerland, Generation, Trend analysis Introduction The patterns of our food consumption are extremely relevant to our environmental foot - print (Oita et al. 2018; Jarmul et al. 2020; von Ow et al. 2020)—and they are in constant motion. The consumption of beverages in the USA (Duffey and Popkin 2007), fat fish in Norway (Trondsen et al. 2004) and fast food in Asia (Wu et al. 2021) is on the rise, and the opposite is the case for dairy products in France (Dubuisson et  al. 2010), yam and millet in Ghana (Wilhelmina et al. 2010) and traditional food among the Inuit (Hopping et al. 2010). With respect to environmentally more relevant trends, scientists welcome a growing trend of vegetarianism and veganism in the North (Tepper et al. 2022), whereas the environmental footprint in the Global South is still on the rise (Goldstein et al. 2016). However, the nature of these shifts in our diets, despite their high potential relevance (Kearney 2010), is only poorly understood. It is clear that diet changes are mostly caused by behavioural changes (Siega-Riz et al. 1998; Jahns et al. 2001; Smith et al. 2020), which distinguishes them from changes in energy demand (York 2007), for example, because © The Author(s) 2023. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the mate- rial. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http:// creativecommons.org/licenses/by/4.0/. Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 2 of 18 the latter are mostly caused by sociodemographic changes. However, it is unclear how these behavioural changes altering our food basket are caused. The change in people’s food choice shapes existing food systems. The trend is one of the simplest estimates of a change in behaviour, although we cannot argue that the food consumption of a 35-year-old person in 1990 is interrelated with the food consumption of a 35-year-old person in 2020. Nevertheless, studies have often measured consumption in age groups (see section ‘Food consumption trends and generations’) and assumed that the changes in consumption dynamics may happen in spite of possibly new behavioural patterns of new generations and generational replacement (e.g. Mori and Saegusa 2010; Arnaudova et al 2022; Baur et al 2022). The reason for the present study is the absence of any quantitative evidence for such differences between generations in the area of food choice and its dynamics. The knowledge about trends in food choice of different genera - tions may improve the forecasts of future food trends, which constitutes the importance of developing this knowledge. This paper compares the trends in food consumptions between generations and clas - sifies the total population trend as inter- or pangenerational trend. A theoretical frame - work that highlights the role of generations is presented in the ‘Food consumption trends and generations’ section. The ‘Materials and method ’ section describes the data and the method with which to check the theoretical concept. The ‘Results’ section presents and discusses the results, and the ‘Discussion and conclusions’ section provides conclusions. Food consumption trends and generations Theoretical framework The studies on food trends mentioned in the Introduction do rarely consider the behav - ioural differences between generations. We carried out an integrative review of literature (see, e.g. Snyder 2019) to collect the studies about food consumption over many genera- tions. As summarised in Table  1, the studies often discuss the mentioned behavioural differences in selected countries and regularly find a significance of age–period–cohort (APC) variables, although the models vary. The examples are a double-hurdle approach by Aristei et  al (2008) for Italy, a cohort analysis and seemingly unrelated regressions by Drescher and Roosen (2013) for Germany, probit, logit and APC models by Gus- tavsen and Rickertsen (2014, 2018a, 2018b) for Norway, APC models for Finland (Kähäri 2020, 2021), APC decompositions for Japan and Korea (Mori and Saegusa 2010; Mori and Stewart 2011; Mori et al. 2012; Mori 2021, 2022), a latent class analysis by Bezerra et al. (2018) for Brazilian adults, and the bulk of literature for the USA, where one can find Tobit models and their modifications (Blisard 2001; Harris and Blisard 2000, 2001; Stewart et  al 2012), cross-sectional approach (Christopher 2016), almost ideal demand system (Lee et al. 2020), as well as APC models for the widest range of foods and birth cohorts (Beatty et  al. 2013). These studies assigned generations to individuals, found the significance of the APC variables and did expectations about the future behaviour of generations. None of these studies estimated, compared and classified food trends between generations, which allows us to stress the novelty of our research question com- pared to the existing literature. In addition to the novelty of the research question, there is a need to select the appro- priate way to define generations, at least for modelling purposes. Some previous studies M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 3 of 18 Table 1 The coverage of previous studies on food consumption between generations Products Period 1–19 years 20–29 years 30 years and more a d One type of food Aristei et al (2008) and Gus- Gustavsen and Rickertsen Mori (2021, 2022) , tavsen and Rickertsen (2014) (2018b), Gustavsen et al Mori et al (2012) (2014), Lee et al (2020) , Mori and Stewart et al and Saegusa (2010) and Stew- (2012) art and Blisard (2008) Many types of food Bezerra et al. (2018), Blisard Gustavsen and Rickertsen Beatty et al (2013), b b (2001) , Harris and Blisard (2018a), Mori and Stewart Kähäri (2021) and b e d (2000, 2001) and Vaterlaus (2011) and Otsuka et al (2014) Schmeling (2014) et al. (2015) Specific intake Yang (2020) – Christopher (2016); Kähäri (2020) Food away from/at home Teisl et al (2016) Drescher and Roosen (2013); – Zan and Fan (2010) The generations are defined as a 10-year age–period–cohort, if other is not mentioned. Only meat (even of many types, incl. fish), only fruit and their variety, only milk, only non-alcoholic beverages, etc. Generation is defined on 5-year intervals Generations are defined historically Only a certain cohort studied Fruits in Japan, rice in Korea defined the generation by the age of a head of a household that may distort the genera - tional effects in households with members from various generations. The period of one generation also varies between the studies from 5 to 10-year birth interval. There are also studies that assign generations as it is historically common (e.g. ‘Baby Boomers’, ‘X’, ‘Y’), so that the length of the studied periods may differ even within one study. There are also definitions that are relevant only for selected countries, conditions and societies (e.g. Interbellum generation, MTV generation, Sandwich generation, The Boomerang Generation). These perspectives neglect, in a way, the impact of age. It competes with the perspective that food demand changes over the course of life, a well-documented perspective (Cortez and Senauer 1996; Jho 1999; Zhong et al 2012; Bilgic and Yen 2013). However, it is the merit of the approach centred on generations that the evolution of val- ues and tastes in societies can better be taken into account. Section "Generations" shows the way to avoid the mentioned issues in defining generations, albeit using more data. Studies with population data on consumption and age across at least a 20-year period of time could potentially predict a 10-year trend line for available products. However, to the best of our knowledge, a few studies had enough data for such quantitative exercise for many foods, and those studies did not focus on distinguishing food trends for many product types. The entire literature, however, somehow neglects to systematically take into account that some societal trends emerge because the young generation behaves differently from the old one. This simple principle, while being well documented by political scientists (Rodrigo and Torreblanca 2001; Breen 2014), has not been given suf- ficient attention when looking at food trends. In Switzerland, the trends in food consumption are covered by Swiss statistics (FSO 2022; FSVO 2021, 2019; FCN 2018) and researchers (e.g. de Abreu et al 2014; Dumont et  al 2017), albeit not in a generational perspective. The studies report that more and more young people from urban areas are giving up eating meat and this situation is Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 4 of 18 expected to continue in the future. In a regional case study (Schneid Schuh et al. 2018), the adult population slightly improved compliance with the Swiss dietary guidelines over time, while the provision of dietary guidelines did not impact these trends. With regard to many disaggregated foods, the situation is even less clear, because most studies cover only a specific product or dietary unit and analyse less than a 10-year period. The importance of distinguishing inter‑ and pangenerational food trends If the young generation behaves differently from the old one, then the compared genera - tional trends would have different shapes, otherwise the consumption dynamics would be similar. Having this in mind, we suggest that food trends can be distinguished into inter- and pangenerational trends. Therefore, defining intergenerational and pangen - erational food trends is the first contribution of this study. Pangenerational trends are simpler in their essence, because we define that they are shaped by the same dynamics (increasing or decreasing consumption) across all generations, slightly adapting the use of the term ‘pangenerational’ by Maxwell and Broadbridge (2014). Therefore, the prod - uct consumption trend for the total population is pangenerational, if trends of product consumption for all studied generations have the same sign. If the negative (positive) trend for product consumption was pangenerational, it would mean that the overall negative (positive) trend is significantly negative (positive) for each age group. If some generations had a positive and others a negative trend, the overall pattern would be intergenerational (borrowing the term from Meyer 2017). In our opinion, there are two reasons giving importance to the distinction. One, the distinction between pan- and intergenerational food trends is potentially important for marketing strategists. It is key for producers and retailers to find out to which target group they should tailor their promotional activities (Reutterer et  al. 2006; Camilleri 2018). For example, if the decline in food consumption prevailed despite an increasing consumption by elder segments, it would certainly be advantageous to focus on these elder segments when promoting this food. Two, scientists who are interested in con- sumption forecasts will find support in the distinction between the two categories of demand trends. If a negative trend, for example, is shaped by elder consumers, while the youngest generation increases their consumption, it is unlikely that the negative trend is going to be a long-term trend because the older generation will die out over time. One field where intergenerational food trends may be particularly important may be meat consumption. It is well known that young people are more open to vegetarian diets than older generations are (Stoll-Kleemann and Schmidt 2017; Nery do Carmo, 2019; Giacoman et al. 2021). As previous literature did not address trends between gen- erations, we cover this research gap and hypothesise that the share of intergenerational trends is higher for meat products than for other products. Materials and method Data For two reasons, Switzerland is a suitable case study to test our hypothesis and to illus- trate the different categories of food trends. Owing to the country’s high level of wealth and good trade relations, food availability is almost unlimited so that shifts in consump- tion are mostly demand rather than supply-driven. In addition, there are good databases M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 5 of 18 available for Swiss consumers that, in the past, have enabled a number of empirical and research studies on consumption patterns (Aepli and Finger 2013; Götze and Mann 2015; Götze et al. 2016; Sahakian et al. 2020). We used disaggregated agent-based data issued by the Swiss Federal Statistical Office for the years 1990 and 2000–2017 for 6–12 thousand random participants of the sur- vey (households of Switzerland) each year. The procedure of data collection is a random sample of households in Switzerland who report their household’s characteristics and food purchasing diaries. Therefore, the data we used are the result of a reliable ran - domised observational survey. The processing of the conducted survey was the same each time, but there were major changes in the period of the survey, the product cat- egories and the households’ characteristics declared across the years. The data in 2006– 2017 specified the yearly information about the households’ respondents and average monthly consumed volumes and expenditures of 105 foods for each household. The data in 1990 and 2000–2005 specified similar information, but the households and foods were described in less detail. The nulls for the households that declared zero consump - tion were recorded in the data and were considered in all estimations of the present paper. The average consumption volumes may differ from reported ones in food statis - tics because households’ food diaries contain only food purchases of the households, not food consumption in restaurants or canteens. As we aimed at studying trends, we needed to scale the data over time and genera- tions using only the most reliable data. Therefore, we used only the data of 1990, 2000, 2010 and 2017 to define the trends in food consumption. We used the data of 2017 to approximate the data for 2020 because the latter were not available in 2023 and the con- sumption might have been distorted by the Corona crisis. Because of food classifications (product categories) mismatch across the years, we aggregated several food categories into more general food categories that corresponded by meaning. Therefore, compared with official statistics, the food categories in the present study appear to be more gen - eral over the years for the least stable food categories, such as non-alcoholic drinks. We defined 49 main foods that matched precisely across all years, accurately grouped the remaining categories into more general food categories, and studied 60 food categories in total. These aggregations allowed us to avoid a major reduction in the data. Generations In this study, we defined a generation as all people of a certain age in all households in the corresponding year (see Table  2). Following the data availability, we started defin - ing generations in 1990, allocating a 10-year period to each generation. Therefore, the first generation was 75 and older in 1990, the second was 65–74 years old, the third was 55–64 and so on until the seventh generation, aged 15–24  years old in 1990. In 2000, that is 10 years later, the seventh generation changed its age from 15–24 to 25–34, and first observations on consumption were available for the eighth generation, then aged 15–24. Therefore, the seventh generation was assigned to the age group 15–24 in 1990, 25–34 in 2000, 35–44 in 2010 and 45–54 in 2020. The same logic was applied to other generations. If all participants of the household were in the same generation according to Table  2, the household was assigned to this generation, i.e. generations were assigned to singles Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 6 of 18 Table 2 The age (birth years) of generations 1–10 Age (years) 1990 2000 2010 2020 15–24 7 (1966–1975) 8 (1976–1985) 9 (1986–1995) 10 (1996–2005) 25–34 6 (1956–1965) 7 (1966–1975) 8 (1976–1985) 9 (1986–1995) 35–44 5 (1946–1955) 6 (1956–1965) 7 (1966–1975) 8 (1976–1985) 45–54 4 (1936–1945) 5 (1946–1955) 6 (1956–1965) 7 (1966–1975) 55–64 3 (1926–1935) 4 (1936–1945) 5 (1946–1955) 6 (1956–1965) 65–74 2 (1916–1925) 3 (1926–1935) 4 (1936–1945) 5 (1946–1955) 75 and older 1 (1900–1915) 2 (1916–1925) 3 (1926–1935) 4 (1936–1945) and to households with people of similar age, which is more precise than defining the generation by a generation of a household head, but considerably reduces the number of households assigned to generations. Therefore, we introduced two more categories. First, we allocated families with children into a separate category. Second, we defined a group of ‘mixed’ generations if the household had no children younger than 15 years old but the age difference between the participants did not allow allocating them to one generation. We excluded households with children and the group of ‘mixed’ generations from the generation classification but considered their observations separately and in the total population group. As a result, we obtained 6 groups with 4 sets of observa- tions for trend analysis (generations 4–7, ‘families with children’ and ‘mixed’), 2 genera- tions with 3 sets of observations (generations 3 and 8) and 2 generations with only 2 sets of observations to study (generations 2 and 9). We assumed a certain homogeneity of agents within each generation over time. We precisely analysed generations 3–8 and compared the results with the estimations performed for all available data. We chose this rationale, because if we had followed people in the same age cohort over years, then the observations for each food trend would have included people from several genera- tions over time. The information on the age and generation of the participants in the households and the information on the households’ population and food consumption were merged for further analysis. In total, our analysis included 1.3 million observations representing consumption volumes per person for 60 comparable food categories in the households for the years 1990, 2000, 2010 and 2020. Method In this study, we grouped households in 10-year cohorts into generations and followed them comparing their reported eating behaviour for changes. Further, for each food, we compared the revealed trends between different generations to give a final charac - teristic for a trend for the total population. We aimed to estimate the trends in Swiss food consumption over the period from 1990 until 2020 and to check if the share of intergenerational trends was higher among animal products than among crop products. For this purpose, we applied a trend analysis. Thereby, we compared the consumption trends between the foods and generations in Switzerland, classified the products accord - ing to the trend type and discovered the correlation of the trend type with a product type. Household consumption comparisons can be difficult because the number of M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 7 of 18 participants differs between the households. However, under the assumption that the households assigned to the same generation in Switzerland were homogeneous and the people in these households would, on average, have similar consumption patterns, the consumption volumes per person served as an identifier of average consumption, which is comparable between households. In addition, we assume that the age effects are included in the generational trends. We expected these assumptions to hold for all observations within generations. Formally, for each food i and generation j at time t , we had the observations in the households h and defined c —the consumption (in grams per person)—and the i,j,t ,h slopes of the consumption trends β and β . We obtained the estimates of the trends in i,j i consumption per person β and β , using the following simple regressions: i,j i For generation j : c = α + β t + ε , i,j,t,h i,j i,j i,j,t,h (1) For total population: c = α + β t +˜ε , i,t,h i i i,t,h (2) where α and α are constants and ε and  ε are the error terms. Therefore, the i,j i i,j,t ,h i,t ,h trends in our study are measured by regressing the variable of interest on a time vari- able. This is a common procedure, albeit we have many observations at the same point of time. By definition, the time trend can be built for 3 periods and more; for 2 periods one can only define the growth or decline. That is why the trend was possible to define and built only for generations 3–8, ‘mixed’ generation households and households with chil- dren, because all of them were observed over 3–4 periods. For our research purposes, more points would be beneficial, but were not available. Our data did not allow various methods of dynamic investigation. For each food i , we classify the trend β as. • intergenerational if at least two of β have significant opposite signs; i,j • pangenerational if all β have the same and significant sign; i,j • weakly pangenerational if the sign is the same among significant β . i,j Furthermore, we defined s—the dummy variable for the type of the trend, where s equals 1 if is intergenerational and 0 if it is pangenerational or weakly pangenerational. We explained the type of the trend with p—the dummy variable for a food type, where p equals 1 if the food i is meat and 0 otherwise. We used 59 observations for discovering the relation of a binary trend type with a binary food type (we dropped the mixed food category ‘Oils and fats’). We denoted the relation between s and p as δ and assessed it by using correlation analysis, the Rogers–Tanimoto measure (see more in Zhang and Sri- hari 2003), robust linear regression (with and without the constant, using the ‘felm’ func- tion of the ‘lfe’ R package by Gaure 2020) and a logit model (‘glm’ function of the ‘stats’ R package). More details on the applied methods may be found in Wooldridge (2013). The estimates for β , β and δ(i.e. β , β and δ ) and their significance were the inter - i,j i i,j i est of the present study. A zero or insignificant estimate β would mean that we have i,j no evidence that food consumption changed over time for the defined generation j and food i . Similarly, a zero or insignificant estimate δ would mean that food con- sumption trend types did not correlate with a type of food. We expected a variety of Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 8 of 18 trend types across foods. Equation  1 is also applied to households with children and to a group of ‘mixed’ generation households. Results Descriptive evidence Figure 1 shows the descriptive results for four selected food categories, revealing that the distinction between pangenerational and intergenerational trends is a meaning- ful one. The trends for eating beans and peas and for drinking milk show very similar patterns over all generations, albeit in different directions, and can therefore be con - sidered as pangenerational. The fact that the global demand for protein crops such as beans and peas is rising, mostly for feed purposes but partly also for meat substitution, is increasingly receiv- ing attention (Schaack et  al. 2014; McGill et  al. 2019), and no generation in Switzer- land is an exception to this trend. While the global demand for milk is also on the rise (Adesogan and Dahl 2020), Swiss consumers throughout all generations consume less milk than they used to, with the sharpest decline in the 1990s. This is also a well- documented trend (Statista Research Department 2020). The demand patterns in the bottom part of the figure look more complex and are examples of intergenerational patterns. While Swiss consumers in total follow the global trend of increasing poultry consumption (Bryan and Classen 2020), Fig.  1 shows that this trend is merely driven by the middle generations. Neither the very young nor the very old generations have increased their poultry consumption. The trend for sheep and goat meat is also very heterogeneous. Here, it seems that meat is increasingly attractive to young people but not to older generations, who have reduced their consumption. Fig. 1 Examples of two pangenerational and two intergenerational food trends M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 9 of 18 Heterogeneity of food consumption trends between generations The econometric analysis for quantitative evidence on the heterogeneity of food con - sumption trends between generations is presented in Table  3. The consumptions of most fresh vegetables and fruits and of flagship foods (in Switzerland, these are choco - late, cheese and curd) have a pangenerational trend. Among non-animal-based foods, which form more than half of the studied product list, only citrus fruits and mush- rooms have intergenerational trends. For citrus fruits, the slope turns from strongly negative among the oldest generation to strongly positive among the youngest. The trends for mushrooms are less significant, and such a gradient is less transparent. The consumption trends for 7 of the 11 studied meat products are intergenerational. The exceptions are poultry, ham and bacon, horse meat and canned meat. The 6th and the 7th generations tend to consume more poultry over time, the older (3rd, 4th and 5th) generations—less horse, wild and rabbit meat. We found intergenerational trends for 15 of the 60 studied products. For dairy products, there is no product that has an intergenerational trend, i.e. most trends are pangenerational. In the case of flour, generations have positive trends, but the total trend is negative because of negative trends in mixed households and households with children. The 8th generation stands apart from other generations with insignificant trends for banana, butter, coffee, potatoes, non-alcoholic drinks, spirits, and yoghurt consump - tion, supporting earlier observations on behavioural differences between the youngest and older generations. Our estimations demonstrate that these behavioural differ - ences can also be observed concerning at least these seven food preferences. Among households with children, the products with intergenerational trend (except jam) have negative trends over time, whereas the trends for the foods with pangen- erational trends correspond to those of other generations and the total population. Households with children in Switzerland have decreased the consumption of most meat (the exceptions are poultry and canned meat), dairy (except cheese), bread, wines, potatoes, roots, tomatoes, and vegetables (leafy, fruit, and stem), but have increased the consumption of bananas, grapes, lemons, pears and quinces, pasta, cab- bage, canned vegetables, dried crops, and prepared fish and seafood. The type of the trend and the type of the food We used the information on the trend type from Table  3 and the belonging of the foods to meat products to provide precise quantitative evidence for the relations between the type of the trend and the type of the food. The results of these estima - tions are presented in Table 4. The correlation between the trend type and food type is 0.44; the Rogers–Tanimoto measure is 0.5. Both measures indicate an interdependency of trend type and food type, although this interdependency is not strong. However, the one-factor models show that the dummy on meat product is significant as a single factor influencing the trend type in both linear regressions (with and without constant) and the logit model. Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 10 of 18 Table 3 The yearly trends in food consumption per person between generations and foods Food Trends in food consumption β β i,j i j = 3 j = 4 j = 5 j = 6 j = 7 j = 8 Households Mixed households All Trend type [1926–1935] [1936–1945] [1946–1955] [1956–1965] [1966–1975] [1976–1985] with children Meat Beef − 27 (2)*** − 12 (2)*** − 1 (2) 2 (1) 5 (2)** 5 (3) − 7 (1)*** − 11 (1)*** − 7 (0)*** Inter Ham and bacon 2 (2) 1 (1) 3 (1)** 4 (1)*** 4 (1)*** 0 (2) − 1 (0)** − 2 (1)*** − 1 (0)** Horse meat − 1 (0)* − 1 (0)*** − 1 (0)** 0 (0) 0 (0) 0 (0). − 1 (0)*** − 1 (0)*** − 1 (0)*** Pork − 14 (3)*** − 6 (2)** 0 (2) 0 (1) 5 (2)* 3 (3) − 9 (1)*** − 5 (1)*** − 6 (0)*** Inter Poultry − 4 (3) − 1 (2) 4 (2). 5 (2)** 8 (2)*** − 5 (5) 7 (1)*** 6 (1)*** 5 (1)*** Sausages − 17 (3)*** − 4 (2)* 1 (2) 7 (2)*** 3 (2) 0 (5) − 8 (1)*** − 10 (1)*** − 8 (0)*** Inter Sheep meat and goat meat − 2 (1)** − 1 (1)* 1 (1)* 1 (0)* 1 (0)** 1 (1) − 1 (0)*** − 1 (0)* 0 (0)** Inter Veal − 5 (1)** − 3 (1)** 1 (1) 1 (1)* 0 (0) − 2 (1). − 1 (0)*** − 4 (0)*** − 2 (0)*** Inter Wild and rabbit meat − 5 (1)*** − 2 (0)*** − 1 (0)* 1 (0). 0 (0) 0 (0) − 2 (0)*** − 2 (0)*** − 2 (0)*** Inter Canned meat 1 (1). 0 (1) 1 (1) 1 (1) − 1 (1) 0 (0)** 0 (0) 0 (0) Other meat − 16 (2)*** − 10 (1)*** − 7 (1)*** − 6 (1)*** − 7 (2)*** 6 (3)* − 9 (1)*** − 8 (1)*** − 8 (0)*** Inter Fish Fish − 4 (2)* − 2 (1). 0 (1) 2 (1)* 5 (1)*** 3 (2) − 2 (0)*** − 1 (1) − 1 (0)*** Inter Seafood 1 (1) 0 (1) 2 (1)** 1 (1) 0 (1) − 1 (0)** 0 (0) 0 (0) Fish and seafood prepared 5 (1)*** 3 (1)*** 4 (1)*** 3 (0)*** 2 (0)*** 3 (2). 4 (0)*** 4 (0)*** 4 (0)*** Pan Dairy, margarine and egg Milk − 259 (22)*** − 112 (13)*** − 81 (11)*** − 110 (8)*** − 89 (11)*** − 49 (28). − 242 (5)*** − 188 (6)*** − 190 (3)*** Pan Cream − 24 (2)*** − 17 (1)*** − 13 (1)*** − 11 (1)*** − 2 (2) − 1 (3) − 11 (0)*** − 15 (1)*** − 13 (0)*** Yoghurt − 43 (4)*** − 38 (3)*** − 36 (4)*** − 43 (3)*** − 34 (5)*** − 5 (10) − 28 (1)*** − 31 (2)*** − 30 (1)*** Butter − 14 (1)*** − 12 (1)*** − 8 (1)*** − 7 (0)*** − 6 (1)*** 0 (2) − 10 (0)*** − 13 (0)*** − 11 (0)*** Cheese and curd 42 (6)*** 54 (5)*** 64 (4)*** 58 (4)*** 68 (5)*** 36 (11)** 37 (2)*** 47 (2)*** 48 (1)*** Pan Margarine − 9 (1)*** − 6 (0)*** − 4 (0)*** − 5 (0)*** − 4 (0)*** − 3 (1)*** − 6 (0)*** − 6 (0)*** − 6 (0)*** Pan Egg 9 (2)*** 7 (2)*** 6 (2)** 3 (1). 1 (1) 2 (1)* 2 (0)*** Pan M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 11 of 18 Table 3 (continued) Food Trends in food consumption β β i,j i j = 3 j = 4 j = 5 j = 6 j = 7 j = 8 Households Mixed households All Trend type [1926–1935] [1936–1945] [1946–1955] [1956–1965] [1966–1975] [1976–1985] with children Vegetables, mushrooms, roots Beans and peas 13 (3)*** 23 (3)*** 35 (2)*** 34 (2)*** 36 (3)*** 41 (8)*** 26 (1)*** 30 (2)*** 28 (1)*** Pan Cabbage vegetables 14 (4)** 20 (4)*** 29 (4)*** 32 (4)*** 20 (5)*** 13 (1)*** 20 (2)*** 19 (1)*** Pan Leafy vegetables − 43 (3)*** − 33 (2)*** − 21 (2)*** − 19 (1)*** − 13 (2)*** − 12 (5)* − 27 (1)*** − 32 (1)*** − 28 (0)*** Pan Mushrooms fresh − 1 (0)** − 1 (0)* − 1 (0)*** − 1 (0)** 0 (0) 2 (1). − 1 (0)*** − 1 (0)*** − 1 (0)*** Inter Onions and garlic 47 (5)*** 42 (3)*** 47 (3)*** 45 (3)*** 43 (3)*** 34 (7)*** 30 (1)*** 36 (2)*** 36 (1)*** Pan Potatoes − 127 (27)*** − 80 (13)*** − 46 (6)*** − 15 (7)* − 10 (5)* − 13 (8) − 36 (3)*** − 42 (5)*** − 44 (2)*** Root vegetables − 36 (3)*** − 29 (2)*** − 24 (2)*** − 16 (1)*** − 11 (1)*** − 17 (4)*** − 24 (1)*** − 24 (1)*** − 23 (0)*** Pan Stem and fruit vegetables − 25 (2)*** − 11 (2)*** − 7 (2)*** 2 (2) − 14 (1)*** − 15 (1)*** − 14 (1)*** Tomatoes − 31 (4)*** − 18 (3)*** − 17 (2)*** − 18 (1)*** − 12 (1)*** − 21 (5)*** − 14 (1)*** − 18 (1)*** − 17 (0)*** Pan Canned vegetables and mushrooms 80 (9)*** 51 (7)*** 40 (7)*** 24 (6)*** 6 (7) 27 (3)*** 36 (4)*** 35 (2)*** Dried vegetables and mushrooms 20 (2)*** 23 (2)*** 21 (1)*** 27 (2)*** 17 (2)*** 15 (4)** 18 (1)*** 22 (1)*** 21 (0)*** Pan Fruits Apples − 90 (10)*** − 50 (4)*** − 29 (3)*** − 29 (2)*** − 29 (3)*** − 21 (6)*** − 41 (1)*** − 46 (2)*** − 47 (1)*** Pan Bananas 26 (7)*** 29 (4)*** 23 (4)*** 13 (3)*** 13 (3)*** 9 (11) 5 (1)*** 8 (2)*** 11 (1)*** Berries 12 (4)** 6 (2)** 12 (2)*** 7 (1)*** 9 (2)*** 8 (4)* 0 (1) 1 (1) 3 (0)*** Pan Citrus (except lemons) − 52 (7)*** − 17 (5)** − 10 (4)* − 6 (3)* 1 (4) 20 (9)* − 12 (1)*** − 17 (2)*** − 15 (1)*** Inter Grapes − 4 (5) − 3 (3) 0 (2) 10 (2)*** 10 (3)*** 4 (7) 3 (1)** 2 (1) 2 (1)** Lemons 60 (8)*** 55 (5)*** 57 (5)*** 49 (4)*** 35 (5)*** 25 (9)** 23 (1)*** 38 (2)*** 37 (1)*** Pan Nuts − 4 (2)** 1 (2) − 3 (2)* − 3 (1)* − 1 (2) − 4 (0)*** − 1 (1)* − 2 (0)*** Pears and quinces 30 (7)*** 43 (5)*** 39 (4)*** 30 (3)*** 31 (3)*** 13 (6)* 14 (1)*** 26 (2)*** 25 (1)*** Pan Stone fruits − 22 (6)*** − 7 (4). − 8 (3)** − 5 (2)* 2 (2) − 12 (13) − 8 (1)*** − 17 (2)*** − 12 (1)*** Dried fruits − 2 (1) − 1 (1) − 1 (1) 3 (1)*** 0 (1) 2 (0)*** 1 (0)* 1 (0)*** Other fruits − 2 (4) 4 (3) 9 (3)*** 7 (2)** 16 (4)*** 29 (9)** − 5 (1)*** 6 (2)*** 4 (1)*** Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 12 of 18 Table 3 (continued) Food Trends in food consumption β β i,j i j = 3 j = 4 j = 5 j = 6 j = 7 j = 8 Households Mixed households All Trend type [1926–1935] [1936–1945] [1946–1955] [1956–1965] [1966–1975] [1976–1985] with children Cereal products Bread − 56 (7)*** − 20 (5)*** − 1 (4) − 3 (3) − 5 (5) − 8 (11) − 34 (2)*** − 37 (2)*** − 29 (1)*** Flours 1 (6) 6 (4) 6 (2)** 5 (2)* 3 (2). 17 (12) − 4 (1)*** − 3 (1)** − 2 (1)** Pasta − 1 (3) 4 (3). 7 (2)** 11 (2)*** 8 (3)** − 8 (8) 12 (1)*** 9 (1)*** 9 (1)*** Rice − 3 (2) − 5 (2)** − 1 (1) 2 (1) − 5 (1)*** 5 (5) 2 (1) 1 (1) 0 (0) Coffee, tea and sweets Cocoa and chocolate 14 (4)*** 25 (3)*** 20 (3)*** 17 (3)*** 16 (2)*** 24 (2)*** 21 (1)*** Pan Coffee and substitutes − 26 (3)*** − 21 (2)*** − 17 (2)*** − 9 (1)*** − 6 (1)*** 0 (3) − 7 (0)*** − 12 (1)*** − 11 (0)*** Honey − 8 (3)** − 1 (2) 3 (1)* 5 (1)*** 7 (2)*** 24 (4)*** − 1 (0)** 1 (1) 1 (0) Inter Jam 2 (1)* 2 (1)* − 1 (0). 1 (0)** 0 (1) − 6 (2)** 1 (0)*** 1 (0)** 1 (0)*** Inter Sugar − 25 (5)*** − 9 (2)*** 0 (1) − 2 (1) − 1 (1) − 3 (3) − 11 (1)*** − 18 (1)*** − 14 (1)*** Tea and herbs 0 (1) − 1 (0)** − 1 (0)* − 1 (0)*** − 2 (0)*** − 5 (1)*** 0 (0) 0 (0). − 1 (0)*** Liquids Beer − 41 (11)*** − 49 (12)*** − 47 (12)*** 14 (9) 50 (14)*** 42 (23). − 3 (3) 14 (6)* 5 (3). Inter Mineral water − 267 (28)*** − 176 (35)*** − 59 (41) − 57 (36) − 48 (60) − 19 (13) − 132 (19)*** − 90 (9)*** Non-alcoholic drinks − 236 (49)*** − 147 (32)*** − 111 (28)*** − 106 (26)*** − 81 (47). − 35 (66) − 172 (10)*** − 156 (17)*** − 130 (8)*** Olive oil 11 (2)*** 6 (1)*** 7 (1)*** 8 (1)*** 3 (1)*** 11 (6). 7 (0)*** 8 (1)*** 7 (0)*** Pan Spirits and liqueurs 16 (5)** 11 (3)*** 11 (3)*** 5 (2)*** 4 (1)** − 2 (2) 2 (0)*** 3 (1)*** 5 (0)*** Wines − 32 (19). − 24 (14). 9 (15) 38 (9)*** 89 (16)*** − 9 (17) − 14 (3)*** 3 (6) 5 (3). Inter Oils and fats (except olive oil) − 14 (3)*** 0 (2) 5 (2)** 6 (1)*** 9 (2)*** 8 (3)* − 5 (1)*** − 3 (1)** − 2 (0)*** Inter Significance codes: ‘***’ = p ≤ 0.001; ‘**’ = p ≤ 0.01; ‘*’ = p ≤ 0.05; ‘.’ = p ≤ 0.1. Values in round brackets are standard errors. Values in square brackets are years of birth. All estimations are done in grams, except ‘Liquids’ and ‘Milk’, which are measured in millilitres. The empty cells in trend type mean a weakly pangenerational trend. Denotes the foods that had no data in 1990 M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 13 of 18 Table 4 The Relation between Trend Type and Food Type Type of measure Correlation 0.44 Rogers–Tanimoto 0.504 Linear regression with a constant 0.44(0.14)** Linear regression without a constant 0.57(0.13)*** Logit model 2.16(0.70)** Significance codes: ‘***’ = p ≤ 0.001; ‘**’ = p ≤ 0.01; ‘*’ = p ≤ 0.05; ‘.’ = p ≤ 0.1. Values in brackets are standard errors. The Rogers–Tanimoto measure was calculated with the ‘rogersTanimoto’ function of the ‘partitionComparison’ R package. Trend type dummy is defined as 1 if the trend is intergenerational and 0 otherwise. Food type dummy is defined as 1 if the food is meat and 0 otherwise Limitations The analysis has its limitation, in particular with regard to the quality of the data. It is based on household data, so that a lot of data, namely consumption in households that stretched over several generations, could not be utilised. This ‘selection bias’ may have distorted the results, and similar analyses with individual consumption datasets that are available over a long period might produce results that are more reliable. Such datasets may also be used for developing food trend forecasts taking the distinction between pan- and intergenerational trends into account. The second limitation of our study is a territorial and time coverage, as well as the fact that many factors stayed beyond the scope of our study, because we aimed at only quantifying and classifying the food trends between generations. There- fore, the literature for different time frames and territories could have been only partially integrated with our research, as our research focussed on Swiss food markets in 1990–2020. In addition to traditional factors such as income and gen- der, it would have been useful to consider institutional factors in future studies, for example, transitions in 2008–2009 and 2014–2015 (Loginova and Mann 2022a) and Corona-related transitions in 2020–2021, that predefined a period of new institu- tions starting in 2022. In this study, we attempted to avoid the years characterised by transition-related distortions and used only the data of 1990, 2000, 2010 and 2017 (to approximate the data for 2020). When more data are available over time, it would make sense to take institutional, economic and biological waves into account (Loginova and Mann 2022b), because having no data before 1990, we know very few about the eating of generations living in periods before. That means also that trends in the period 1990–2020 describe only a small part of their lives, that is relevant for only the last 30 years. In addition, the people in the oldest generation represent only a longest-living part of the society they lived in. Mirroring this, the youngest generations represent all the young people, including those whose consumption will not allow to change their age in the future 10-year periods. To the best of our knowl- edge, this selection bias has no solution so far, except randomising the choice of peo- ple (households) studied. We, however, did not perform this approach in our study ourselves, because our data were initially a result of a randomised survey from a reliable source. Mann and Loginova Agricultural and Food Economics (2023) 11:10 Page 14 of 18 Discussion and conclusions The significance of the explanatories and nonzero estimations of interdependencies allow us to confirm that (1) the distinction between pangenerational and intergenera - tional trends is a meaningful one, (2) the share of intergenerational trends is higher among animal products in general and meat products in particular, and (3) the type of food is significant for a trend type. However, the negative trend of meat consumption in our sample has been formed rather by older generations and families with children than by younger generations. This may be explained by the fact that the data we used in the study do not cover people under 35 years old in 2020, the very generation likely to follow vegan or vegetarian diets. Since, obviously, longer panel data by the young- est generation is not available, future work that finds solutions for this problem would be desirable. Knowing how the consumption of the youngest generation is evolving within a country could provide important marketing and policy outlets, as well as theoretical ones. Our descriptive and the econometric analyses have shown that different types of food trends exist. For the slight majority of trends, there are no major behavioural differences between generations, a pattern that we called pangenerational. However, especially for a number of food items for which the overall demand is declining over time, the genera- tional patterns differ from each other, a situation that we described as intergenerational. The demand for citrus fruits, for example, rises for the young generations, while—in accordance with the overall negative trend—elder people decrease their consumption. This pattern matters because it implies that the negative trend of citrus fruit demand in the past is unlikely to be continued in the future and will require a change in marketing and policymaking. Generational analysis is used in marketing (Rentz and Reynolds 1991) for which our new distinction may have significant impacts. Promotion teams may consider negative pangenerational trends as an unavoidable loss of consumers, positive pangenerational trends as an opportunity to conduct age-independent promotions and intergenerational trends as the chance to target the most sensitive or a highly potential age group. The same applies to policymakers who may want to foster pro-social nutritional behaviour like the reduction in meat consumption. The products with intergenerational trends are usually consumed less by older genera - tions and more by younger generations (e.g. beef, beer, citrus, fish, honey, mushrooms, pork, sausages, sheep and goat meat, wild and rabbit meat). Therefore, for the majority of the products with intergenerational negative trends, this trend is driven by older gen- erations and may receive a positive impulse in future if younger generations continue their current diet trends. The distinction between inter- and pangenerational trends has the potential to make forecasts on food trends more precise and to improve marketing and promotional activi- ties. The results have shown that projections on meat consumption require the use of age-related information and contribute to the growing evidence on predicting food and meat consumption (e.g. Zeng et al. 2019; Van Dijk et al 2021; Hassoun et al 2022). As the relevance of food trends for public health and the environment can hardly be overesti- mated, it is worthwhile to explore the nature of these food trends in more depth, gener- ating useful results for both managers in the food industry and policymakers. M ann and Loginova Agricultural and Food Economics (2023) 11:10 Page 15 of 18 Acknowledgements The authors thank anonymous reviewers for their constructive comments on an earlier draft. Author contributions DL was responsible for software, data curation, validation and analysis. SM performed conceptualisation, supervision, reviewing, and was a major contributor in writing the manuscript. Both authors read and approved the final manuscript. Authors’ information Stefan Mann: Dr. rer. pol. Dr. sc. agr. habil., Prof., The leader of Socioeconomics research group, Research Division Competi- tiveness and System Evaluation, Research Station Agroscope, Federal Office of Economics. Address: Tanikon 1, CH-8356 Ettenhausen, Switzerland. Daria Loginova: Dr. rer. pol., Post-Doc, Department Socioeconomics, Research Division Competitiveness and System Eval- uation, Research Station Agroscope, Federal Office of Economics. Address: Tanikon 1, CH-8356 Ettenhausen, Switzerland. Funding This work was supported by Agroscope. Availability of data and materials The datasets used and analysed during the current study are available from the corresponding author upon reasonable request. Declarations Competing interests The authors have no conflicts of interest to declare. Received: 4 January 2023 Revised: 7 February 2023 Accepted: 21 March 2023 References Adesogan AT, Dahl GE (2020) MILK Symposium Introduction: dairy production in developing countries. J Dairy Sci 103(11):9677–9680. https:// doi. org/ 10. 3168/ jds. 2020- 18313 Aepli M, Finger R (2013) Determinants of sheep and goat meat consumption in Switzerland. Agric Food Econ. https:// doi. org/ 10. 1186/ 2193- 7532-1- 11 Aristei D, Perali F, Pieroni L (2008) Cohort, age and time effects in alcohol consumption by Italian households: a double- hurdle approach. 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Journal

Agricultural and Food Economics – Springer Journals

Published: Mar 27, 2023

Keywords: Food; Consumption; Switzerland; Generation; Trend analysis

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