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Revisiting Mortality Deceleration Patterns in a Gamma-Gompertz-Makeham Framework

  • Filipe RibeiroEmail author
  • Trifon I. Missov
Chapter
Part of the The Springer Series on Demographic Methods and Population Analysis book series (PSDE, volume 39)

Abstract

We calculate life-table aging rates (LARs) for overall mortality by estimating a gamma-Gompertz-Makeham (ΓGM) model and taking advantage of LAR’s parametric representation by Vaupel and Zhang (Demogr Res 23(26), 737–748, 2010). For selected HMD countries, we study how the evolution of estimated LAR patterns could explain observed (1) longevity dynamics, and (2) mortality improvement or deterioration at different ages. Surprisingly, the age of mortality deceleration x showed almost no correlation with a number of longevity measures apart from e0. In addition, as mortality concentrates at older ages with time, its characteristic bell-shaped pattern becomes more pronounced. Moreover, in a ΓGM framework, we identify the impact of senescent mortality on shape of the rate of population aging. We also find evidence for a strong relationship between x and the statistically significant curvilinear changes in the evolution of e0 over time. Finally, model-based LARs appear to be consistent with point (b) of the “heterogeneity hypothesis” (Horiuchi and Wilmoth, J Gerontol Biol Sci 52A(1), B67–B77, 1997): mortality deceleration, due to selection effects, should shift to older ages as the level of total adult mortality declines.

Keywords

Mortality deceleration LAR Longevity dynamics Heterogeneity 

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.CIDEHUS.UE – University of ÉvoraPalácio do Vimioso – Largo do Marquês de Marialva 8ÉvoraPortugal
  2. 2.Max Planck Institute for Demographic ResearchKonrad-Zuse-Str. 1RostockGermany
  3. 3.Mathematical DemographyUniversity of RostockRostockGermany

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