Full Citation
Title: In a Stationary Population, the Average Lifespan of the Living Is a Length-biased Life Expectancy
Citation Type: Journal Article
Publication Year: 1156
ISBN:
ISSN:
DOI: 10.18128/MPC2020-07
NSFID:
PMCID:
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Abstract: What is the average lifespan in a stationary population viewed at a single moment in time? Even though periods and cohorts are identical in a stationary population, we show that the answer is not life expectancy, but a length-biased version of life expectancy. That is, the distribution of lifespans of the people alive at a single moment is a self-weighted distribution of cohort lifespans, such that longer lifespans have proportionally greater representation. This result connects stationary population lifespan measures to a well-developed body of statistical results; provides new intuition for established demographic results; generates new insights into the relationship between periods, cohorts, and prevalent cohorts; and offers a framework for thinking about mortality selection more broadly than the concept of demographic frailty. Acknowledgements:
Url: https://doi.org/10.18128/MPC2020-07
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Authors: Wrigley-Field, Elizabeth; Feehan, Dennis M
Periodical (Full): Social Science Building
Issue:
Volume: 267
Pages: 19
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