Period parity progression measures with continued fertility postponement: a new look at the implications of delayed childbearing for cohort fertility
AbstractIn this paper we introduce a new set of period parity progression measures with continued fertility postponement in order to account for two distinct implications caused by delays in childbearing: tempo distortions imply an underestimation of quantum of fertility in observed period data, and the fertility aging effect reduces higher parity births because the respective exposure is shifted to older ages where the probability of having another child is quite low. Our measures remove the distortion and provide means to assess the latter aging effect. The measures therefore provide an unified toolkit of fertility measures that (a) facilitate the description and analysis of past period fertility trends in terms of synthetic cohort behavior, and (b) allow the projection of the timing, level and distribution of cohort fertility using the most recently observed period-quantum and tempo changes. Due to their explicit relation to cohort behavior, these measures extend and improve the existing adjustment of the total fertility rate. We apply these methods to Sweden during 1970-1999. (AUTHORS)
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Bibliographic InfoPaper provided by Max Planck Institute for Demographic Research, Rostock, Germany in its series MPIDR Working Papers with number WP-2001-001.
Date of creation: Jan 2001
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- J1 - Labor and Demographic Economics - - Demographic Economics
- Z0 - Other Special Topics - - General
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- Evert van Imhoff, 2001. "On the impossibility of inferring cohort fertility measures from period fertility measures," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 5(2), pages 23-64, September.
- Tomas Frejka & Gérad Calot, 2001. "Cohort childbearing age patterns in low-fertility countries in the late 20th century: Is the postponement of births an inherent element?," MPIDR Working Papers WP-2001-009, Max Planck Institute for Demographic Research, Rostock, Germany.
- Hans-Peter Kohler & Lisbeth B. Knudsen & Axel Skytthe & Kaare Christensen, 2002. "The fertility pattern of twins and the general population compared: evidence from Danish cohorts 1945-64," MPIDR Working Papers WP-2002-005, Max Planck Institute for Demographic Research, Rostock, Germany.
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