期刊
AMERICAN ECONOMIC REVIEW
卷 101, 期 3, 页码 435-441出版社
AMER ECONOMIC ASSOC
DOI: 10.1257/aer.101.3.435
关键词
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类别
资金
- NICHD NIH HHS [R24 HD047879, R21 HD055613] Funding Source: Medline