There have been relatively few evaluations of the effect of private insurance and Medicaid on infant health, and results from previous studies are inconclusive. The objective of this study if to estimate the effect of private insurance coverage and Medicaid participation on birth weight and the...

The authors develop a method to correct for nonrandom measurement error in a binary indicator of illicit drugs. Their results suggest that estimates of the effect of self-reported prenatal drug use on birth weight are biased upwards by measurement error--a finding contrary to predictions of a...