Attrition in heterogeneous cohorts

Loading...
Thumbnail Image

Date

2010-11-10

Journal Title

Journal ISSN

Volume Title

Repository Usage Stats

100
views
106
downloads

Citation Stats

Abstract

In a heterogeneous cohort, the change with age in the force of mortality or some other kind of hazard or intensity of attrition depends on how the hazard changes with age for the individuals in the cohort and on how the composition of the cohort changes due to the loss of those most vulnerable to attrition. Here we prove that the change with age for the cohort equals the average of the change in the hazard for the individuals in the cohort minus the variance in the hazard across individuals. The variance captures the compositional change. This very general and remarkably elegant relationship can be applied to understand and to analyze changes with age in many kinds of demographic hazards, including, e.g., the lifetable aging rate or the intensity of first births. © 2010 James W. Vaupel & Zhen Zhang.

Department

Description

Provenance

Subjects

Citation

Published Version (Please cite this version)

10.4054/DemRes.2010.23.26

Publication Info

Vaupel, JW, and Z Zhang (2010). Attrition in heterogeneous cohorts. Demographic Research, 23. pp. 737–748. 10.4054/DemRes.2010.23.26 Retrieved from https://hdl.handle.net/10161/14790.

This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.


Unless otherwise indicated, scholarly articles published by Duke faculty members are made available here with a CC-BY-NC (Creative Commons Attribution Non-Commercial) license, as enabled by the Duke Open Access Policy. If you wish to use the materials in ways not already permitted under CC-BY-NC, please consult the copyright owner. Other materials are made available here through the author’s grant of a non-exclusive license to make their work openly accessible.