Volume 24 - Article 19 | Pages 455–468  

Linking period and cohort life-expectancy linear increases in Gompertz proportional hazards models

By Trifon Missov, Adam Lenart

This article is part of the ongoing Special Collection 8 "Formal Relationships"

Abstract

In a Gompertz mortality model with constant yearly improvements at all ages, linear increases in period life expectancy correspond to linear increases in the respective cohort life expectancy. The link between the two measures can be given by a simple approximate relationship.

Author's Affiliation

Other articles by the same author/authors in Demographic Research

The Gompertz force of mortality in terms of the modal age at death
Volume 32 - Article 36

Longevity à la mode: A discretized derivative tests method for accurate estimation of the adult modal age at death
Volume 50 - Article 11

Unobserved population heterogeneity: A review of formal relationships
Volume 31 - Article 22

Gamma-Gompertz life expectancy at birth
Volume 28 - Article 9

Most recent similar articles in Demographic Research

The question of the human mortality plateau: Contrasting insights by longevity pioneers
Volume 48 - Article 11    | Keywords: age, France, Gompertz mortality, mortality, mortality plateau, older population, parametric models, supercentenarians, survival analysis, trajectories

Mortality shifts and mortality compression in period and cohort life tables
Volume 41 - Article 40    | Keywords: age at death, cohort life expectancy, compression of mortality, distribution of deaths, mean age at death, period life expectancy

Gompertz, Makeham, and Siler models explain Taylor's law in human mortality data
Volume 38 - Article 29    | Keywords: Gompertz mortality, Makeham, mean mortality, mortality, mortality model, Siler model, Taylor's law

A Dynamic Extension of the Period Life Table
Volume 24 - Article 34    | Keywords: dynamic extension, life expectancy, period life expectancy

Total daily change with age equals average lifetime change
Volume 22 - Article 36    | Keywords: e dagger, Gompertz mortality, life expectancy, measures of senescence, population dynamics, stationary population