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Five period measures of longevity

Author

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  • John Bongaarts

    (Population Council)

Abstract

This study provides a summary of recently proposed alternatives period measures of "longevity" and assesses whether empirical differences between these measures are consistent with predictions from analytic studies. Particular attention is given to the tempo effect. Three of the five period measures are virtually equal to one another in a simulated population in which mortality follows a Gompertz model with a constant rate of improvement. Similar results are observed among females in Denmark, England and Wales and Sweden in the last quarter century. However, these three measures differ substantially from the conventional period life expectancy when mortality changes over time. These findings are consistent with theoretical analysis by Bongaarts and Feeney (2002, 2003, 2005) which demonstrated that this deviation is caused by a tempo effect whose size varies with the rate of change in mortality.

Suggested Citation

  • John Bongaarts, 2005. "Five period measures of longevity," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 13(21), pages 547-558.
    • Handle: RePEc:dem:demres:v:13:y:2005:i:21
    DOI: 10.4054/DemRes.2005.13.21
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    References listed on IDEAS

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    1. John Bongaarts & Griffith Feeney, 2002. "How Long Do We Live?," Population and Development Review, The Population Council, Inc., vol. 28(1), pages 13-29, March.
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    Cited by:

    1. Hisashi Inaba, 2007. "Effects of Age Shift on the Tempo and Quantum of Non-Repeatable Events," Mathematical Population Studies, Taylor & Francis Journals, vol. 14(3), pages 131-168.
    2. Jorge M. Uribe & Helena Chuliá & Montserrat Guillen, 2018. "Trends in the Quantiles of the Life Table Survivorship Function," European Journal of Population, Springer;European Association for Population Studies, vol. 34(5), pages 793-817, December.
    3. Héctor Pifarré i Arolas & José C. Andrade Santacruz & Mikko Myrskylä, 2023. "An overlapping cohorts perspective of lifespan inequality," MPIDR Working Papers WP-2023-046, Max Planck Institute for Demographic Research, Rostock, Germany.
    4. Marc Luy, 2006. "Mortality tempo-adjustment," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 15(21), pages 561-590.
    5. John R. Wilmoth, 2005. "On the relationship between period and cohort mortality," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 13(11), pages 231-280.

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    More about this item

    Keywords

    longevity; life expectancy; period; measures; tempo distortion;
    All these keywords.

    JEL classification:

    • J1 - Labor and Demographic Economics - - Demographic Economics
    • Z0 - Other Special Topics - - General

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