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Tempo and its Tribulations

  • Kenneth W. Wachter

    (University of California at Berkeley)

Registered author(s):

    Bongaarts and Feeney offer alternatives to period life expectancy with a set of demographic measures equivalent to each other under a Proportionality Assumption. Under this assumption, we show that the measures are given by exponentially weighted moving averages of earlier values of period life expectancy. They are indices of mortality conditions in the recent past. The period life expectancy is an index of current mortality conditions. The difference is a difference between past and present, not a ``tempo distortion'' in the present. In contrast, the Bongaarts-Feeney tempo-adjusted Total Fertility Rate is a measure of current fertility conditions, which can be understood in terms of a process of birth-age standardization.

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    File URL: http://www.demographic-research.org/volumes/vol13/9/13-9.pdf
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    Article provided by Max Planck Institute for Demographic Research, Rostock, Germany in its journal Demographic Research.

    Volume (Year): 13 (2005)
    Issue (Month): 9 (November)
    Pages: 201-222

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    Handle: RePEc:dem:demres:v:13:y:2005:i:9
    Contact details of provider: Web page: http://www.demogr.mpg.de/

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    1. Evert Imhoff & Nico Keilman, 2000. "On the Quantum and Tempo of Fertility: Comment," Population and Development Review, The Population Council, Inc., vol. 26(3), pages 549-553.
    2. N. Ryder, 1964. "The process of demographic translation," Demography, Springer, vol. 1(1), pages 74-82, March.
    3. 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, November.
    4. James W. Vaupel, 2002. "Life Expectancy at Current Rates vs. Current Conditions," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 7(8), pages 365-378, August.
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