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Eberstadt, Nicholas . Demographic Impact of Population Policies, The. Washington Quarterly1 Mar. 1998: .
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|46||Demographic studies show that there is statistically no significant effect of contraceptive prevalence on fertility rates. ... Fertility rates can differ by a factor of almost three, from one country to the next, when the reported prevalence of modern contraceptive use is virtually the same.||contraception use family planning population|
|47||Mexico's total fertility rate (TFR) has dropped by 2.5 since the 1970's. Brazil, by contrast, has never had a national family planning program. Yet Brazil's TFR fell by almost exactly the same amount over the same period. ... parents' own desired family size is the best indicator of their country's TFR.|