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Socioeconomic Differences in Old Age MortalityUnobserved Heterogeneity

Socioeconomic Differences in Old Age Mortality: Unobserved Heterogeneity Chapter 9 The true change of the impact of income over age for the individual can only be shown after a successful estimation of unobserved heterogeneity. Until now results are presented where the pattern of socioeconomic mortality differences over age is possibly biased by unobserved heterogeneity and mortality selection. Since we know in what direction the heterogeneity bias works, it is possible to conclude that if there is a bias, then the results in Section 8.4 underestimate socioeconomic mortality differences in old age. As a consequence they would overestimate the convergence. Thus the question is whether the slight mortality convergence between social groups shown in the previous chapters is true or not. Of course, it is true in the sense that if the existing population in old age is considered to be divided into income groups, then the mortality differences correspond to what is shown in the graphs. But it may be unreal in the sense that the observed convergence cannot be interpreted as a decreasing impact of social status on mortality with age because, on the individual level, the impact does not necessarily decline. This chapter is an attempt to analyze and measure the heterogeneity bias. It is http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Socioeconomic Differences in Old Age MortalityUnobserved Heterogeneity

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Publisher
Springer Netherlands
Copyright
© Springer Netherlands 2008
ISBN
978-1-4020-8691-5
Pages
177 –200
DOI
10.1007/978-1-4020-8692-2_10
Publisher site
See Chapter on Publisher Site

Abstract

Chapter 9 The true change of the impact of income over age for the individual can only be shown after a successful estimation of unobserved heterogeneity. Until now results are presented where the pattern of socioeconomic mortality differences over age is possibly biased by unobserved heterogeneity and mortality selection. Since we know in what direction the heterogeneity bias works, it is possible to conclude that if there is a bias, then the results in Section 8.4 underestimate socioeconomic mortality differences in old age. As a consequence they would overestimate the convergence. Thus the question is whether the slight mortality convergence between social groups shown in the previous chapters is true or not. Of course, it is true in the sense that if the existing population in old age is considered to be divided into income groups, then the mortality differences correspond to what is shown in the graphs. But it may be unreal in the sense that the observed convergence cannot be interpreted as a decreasing impact of social status on mortality with age because, on the individual level, the impact does not necessarily decline. This chapter is an attempt to analyze and measure the heterogeneity bias. It is

Published: Jan 1, 2008

Keywords: Unobserved Heterogeneity; Simulated Dataset; Frailty Model; Mortality Difference; Single Cohort

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