Unequal at Birth: A Long-Term Comparison of Income and Birth Weight
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I demonstrate that although socioeconomic differences in birth weight have always been" fairly small in the United States, they have narrowed since the beginning of this century. I argue" that maternal height, and therefore the mother's nutritional status during her growing years accounted for most
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美国国家经济研究局创建时间：
1999-06-01
