Contraception and Fertility: Household Production Under Uncertainty
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Over the past century fertility behavior in the United Stated has undergone profound changes Measured by cohort fertility the average number of children per married woman had declined from about 5.5 children at the time of the Civil War to 2.4 children at the time of the Great Depression. It is
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美国国家经济研究局创建时间：
1973-12-01
