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Article Dans Une Revue Demography Année : 2023

The Dangers of Drawing Cohort Profiles From Period Data: A Research Note

Résumé

Drawing cohort profiles and cohort forecasts from grids of age–period data is common practice in demography. In this research note, we (1) show how demographic measures artificially fluctuate when calculated from the diagonals of age–period rates because of timing and cohort-size bias, (2) estimate the magnitude of these biases, and (3) illustrate how prediction intervals for cohort indicators of mortality may become implausible when drawn from Lee–Carter methods and age–period grids. These biases are surprisingly large, even when the cohort profiles are created from single-age, single-year period data. The danger is that we overinterpret deviations from expected trends that were induced by our own data manipulation.
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hal-04318716 , version 1 (15-03-2024)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Alyson A van Raalte, Ugofilippo Basellini, Carlo Giovanni Camarda, Marília R. Nepomuceno, Mikko Myrskylä. The Dangers of Drawing Cohort Profiles From Period Data: A Research Note. Demography, 2023, 60 (6), pp.1689-1698. ⟨10.1215/00703370-11067917⟩. ⟨hal-04318716⟩
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