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Updated: Jul 10, 2026
20:36
Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
Published on: July 4, 2007
Measuring population aging as a function of fertility, mortality, and migration
Journal of Cross-Cultural Gerontology
|March 1, 1996
Summary
Comparing population aging measures can be misleading. Demographic factors like fertility, mortality, and migration significantly influence aging indicators, necessitating a nuanced approach for accurate cross-population comparisons.
Area of Science:
- Demography
- Gerontology
- Population Studies
Background:
- Population aging is commonly described using measures like the proportion of the population under 15 or over 65, the aged/child ratio, median age, and mean age.
- Cross-cultural gerontology utilizes these measures to compare aging trends between different populations.
Purpose of the Study:
- To investigate the impact of fertility, mortality, and migration on common measures of population aging.
- To develop rates of change for five key population aging measures as a function of demographic processes.
- To assess the consistency of these measures when influenced by demographic changes.
Main Methods:
- Rates of change were calculated for five population aging measures.
- Estimations were performed for stable populations, populations undergoing fertility and mortality declines, populations affected by net migration, and the specific case of Japan (1988-1989).
Main Results:
- The five aging measures generally did not yield consistent rate-of-change estimates.
- The study found that demographic processes (fertility, mortality, migration) significantly affect the observed aging measures.
Conclusions:
- Directly comparing population aging measures across different populations without accounting for underlying demographic factors can lead to misleading conclusions.
- A comprehensive understanding of fertility, mortality, and migration patterns is crucial for accurate interpretation of population aging indicators.
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