@techreport{NBERw9963,
 title = "Does Marijuana Use Impair Human Capital Formation?",
 author = "Rosalie Liccardo Pacula and Karen E. Ross and Jeanne Ringel",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "9963",
 year = "2003",
 month = "September",
 URL = "http://www.nber.org/papers/w9963",
 abstract = {In this paper we examine the relationship between marijuana use and human capital formation by examining performance on standardized tests among a nationally representative sample of youths from the National Education Longitudinal Survey. We find that much of the negative association between cross-sectional measures of marijuana use and cognitive ability appears to be attenuated by individual differences in school attachment and general deviance. However, difference-in-difference estimates examining changes in test scores across 10th and 12th grade reveal that marijuana use remains statistically associated with a 15% reduction in performance on standardized math tests.},
}