Pacula, Rosalie Liccardo. <br/><br/>
Does Marijuana Use Impair Human Capital Formation? / 
Rosalie Liccardo Pacula, Karen E. Ross, Jeanne Ringel. 
 - Cambridge, Mass.  National Bureau of Economic Research  2003. 
 - 1 online resource:  illustrations (black and white); 
 - NBER working paper series  no. w9963 .
 - Working Paper Series (National Bureau of Economic Research)  no. w9963. .
<br/><br/> September 2003. 
<br/><br/> 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. 
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