Volume 22 - Article 36 | Pages 1143–1148
Total daily change with age equals average lifetime change
| 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 - Syddansk Universitet, Denmark
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