Volume 22 - Article 36 | Pages 1143-1148

Total daily change with age equals average lifetime change

By James W. Vaupel

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Date received:22 Apr 2010
Date published:30 Jun 2010
Word count:644
Keywords:e dagger, Gompertz mortality, life expectancy, measures of senescence, population dynamics, stationary population
DOI:10.4054/DemRes.2010.22.36
Weblink:All publications in the ongoing Special Collection 8 "Formal Relationships" can be found at http://www.demographic-research.org/special/8/
 

Abstract

In a stationary population, the change with age in some characteristic at a point in time, summed over all the individuals in the population, equals the change in this characteristic, from the start to the end of the lifetime of each individual, averaged over all lifetimes of the individuals in the cohort.

Author's Affiliation

James W. Vaupel - Max Planck Institute for Demographic Research, Germany [Email]

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