Bongaarts Proximate Decomposition Calculator
Invert the Bongaarts proximate-determinants identity TF = TFR / (Cm x Cc x Ca), recovering total fecundity from the observed TFR and the marriage, contraception and abortion indexes.
Description
Invert the Bongaarts proximate-determinants identity TF = TFR / (Cm x Cc x Ca), recovering total fecundity from the observed TFR and the marriage, contraception and abortion indexes.
Invert the Bongaarts proximate-determinants identity TF = TFR / (Cm x Cc x Ca), recovering total fecundity from the observed TFR and the marriage, contraception and abortion indexes.1
When to use Bongaarts Proximate Decomposition Calculator
Use this fertility measure when the births, women at risk, parity categories, and observation period follow the definition required by the selected method.
- TFR
- Observed period total fertility rate.
- Cm
- Index of marriage Cm in (0, 1].
- Cc
- Index of contraception Cc in (0, 1].
- Ca
- Index of induced abortion Ca in (0, 1].
How the method works
- TF
- Implied total fecundity TF.
Limitations and assumptions
Period and cohort fertility answer different questions. Survey recall, parity truncation, changing age patterns, union definitions, and mismatched exposure populations can materially change the result.
Alternative or Complementary measures
Pair period fertility with cohort measures, parity distributions, or wanted-fertility indicators when available. These complementary views separate timing changes from completed family size and stated preferences.
References
-
Total fertility rate — Wikipedia contributors
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