This paper develops a method to correct for non-random measurement error in a binary indicator of illicit drugs. Our 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...

Objectives — Although the association between antenatal cocaine use and adverse birth outcomes has been well documented, relatively little is known about interventions that may ameliorate these consequences. We therefore examined the relationship between prenatal care and birth weight among a...