Tempo-adjusted total fertility rate: Difference between revisions
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In the presence of tempo effects, we expect that age-specific fertility rates will change over time. The ''tempo-adjusted'' total fertility rate attempts to use data measuring the number, nature, and temporal distribution of live births ''in the current year only'' to estimate how these changes will unfold. | In the presence of tempo effects, we expect that age-specific fertility rates will change over time. The ''tempo-adjusted'' total fertility rate attempts to use data measuring the number, nature, and temporal distribution of live births ''in the current year only'' to estimate how these changes will unfold. | ||
==Bongaarts-Feeney formula=== | ===Bongaarts-Feeney formula=== | ||
Revision as of 01:11, 1 December 2013
Definition
The term adjusted total fertility rate or tempo-adjusted total fertility rate refers to a modified form of the total fertility rate that accounts for the tempo effect in a manner that provides (arguably) a better estimate of the completed fertility rate in the long term.
The standard definition of total fertility rate is that it is the sum of the age-specific fertility rates for all ages. Alternatively, it is the number of live births a hypothetical woman would have if she passed through her childbearing years conforming to the age-specific fertility rate of this particular year. If age-specific fertility rates hold constant over time, i.e., in the absence of tempo effects, the total fertility rate would equal the completed fertility rate for a birth cohort of females who have completed their childbearing years.
In the presence of tempo effects, we expect that age-specific fertility rates will change over time. The tempo-adjusted total fertility rate attempts to use data measuring the number, nature, and temporal distribution of live births in the current year only to estimate how these changes will unfold.