TY - JOUR AU - Pacula,Rosalie Liccardo AU - Ross,Karen E. AU - Ringel,Jeanne TI - Does Marijuana Use Impair Human Capital Formation? JF - National Bureau of Economic Research Working Paper Series VL - No. 9963 PY - 2003 Y2 - September 2003 UR - http://www.nber.org/papers/w9963 L1 - http://www.nber.org/papers/w9963.pdf N1 - Author contact info: Rosalie Liccardo Pacula RAND Corporation 1776 Main Street P.O. Box 2138 Santa Monica, CA 90407-2138 Tel: 310/393-0411 ext. 6494 Fax: 858/350-8798 E-Mail: pacula@rand.org karen_ross Jeanne Ringel E-Mail: ringel@rand.org AB - 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. ER -