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Reassessing the WIC Effect: Evidence from the Pregnancy Nutrition Surveillance System

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  • Andrew D. Racine
  • Cristina Yunzal-Butler

Abstract

Recent analyses differ on how effective the Special Supplemental Nutrition Program for Women, Infants and Children (WIC) is at improving infant health. We use data from nine states that participate in the Pregnancy Nutrition Surveillance System to address limitations in previous work. With information on the mother's timing of WIC enrollment, we test whether greater exposure to WIC is associated with less smoking, improved weight gain during pregnancy, better birth outcomes, and greater likelihood of breastfeeding. Our results suggest that much of the often-reported association between WIC and lower rates of preterm birth is likely spurious, the result of gestational age bias. We find modest effects of WIC on fetal growth, inconsistent associations between WIC and smoking, limited associations with gestational weight gain, and some relationship with breast feeding. A WIC effect exists, but on fewer margins and with less impact than has been claimed by policy analysts and advocates.

Suggested Citation

  • Andrew D. Racine & Cristina Yunzal-Butler, 2007. "Reassessing the WIC Effect: Evidence from the Pregnancy Nutrition Surveillance System," NBER Working Papers 13441, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:13441
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    More about this item

    JEL classification:

    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • I38 - Health, Education, and Welfare - - Welfare, Well-Being, and Poverty - - - Government Programs; Provision and Effects of Welfare Programs

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