Abstract：
:Prenatal care should improve infant health, yet research frequently finds only weak effects. If there are two kinds of pregnancies, 'complicated' and 'normal' ones, then combining these pregnancies may lead prenatal care to appear ineffective. Data from the National Maternal and Infant Health Survey (NMIHS) offers compelling evidence. The standard 2SLS approach yields obviously bimodal residuals and frequently insignificant prenatal care coefficients. In contrast, estimating birth weights with a finite mixture model yields estimates revealing that prenatal care has a substantial effect on 'normal' pregnancies. Our Monte Carlo experiment confirms that ignoring even a small proportion of 'complicated' pregnancies can lead prenatal care to appear unimportant.
journal_name
J Health Econjournal_title
Journal of health economicsauthors
Conway KS,Deb Pdoi
10.1016/j.jhealeco.2004.09.012subject
Has Abstractpub_date
2005-05-01 00:00:00pages
489-513issue
3eissn
0167-6296issn
1879-1646pii
S0167-6296(05)00006-8journal_volume
24pub_type
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journal_title：Journal of health economics
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journal_title：Journal of health economics
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