We analyze marijuana use by college undergraduates before and after legalization of recreational marijuana. Using survey data from the National College Health Assessment, we show that students at Washington State University experienced a significant increase in marijuana use after legalization. This increase is larger than would be predicted by national trends. The change is strongest among females, Black students, and Hispanic students. The increase for underage students is as much as for legal-age students. We find no corresponding changes in the consumption of tobacco, alcohol, or other drugs.
Keywords: Cannabis; College students; GPA, Grade point average; Legalization; MML, Medical marijuana legalization; Marijuana; NCHA, National College Health Assessment; NSDUH, National Survey on Drug Use and Health; RML, Recreational marijuana legalization; Recreational; Substance use; WSU, Washington State University.