Previous research has shown that the recent tightening of college alcohol policies has been effective at reducing college students' drinking. Over the period in which these stricter alcohol policies have been put in place, marijuana use among college students has increased. This raises the...

Although a significant number of empirical studies provide evidence of sequencing in drug use, economic theory remains focused on addiction to a single substance. This paper presents a general model of substance use that allows for the possibility of multi-commodity habit formation and can be...

In this study, we reconsider the relationship between heavy and persistent marijuana use and high school dropout status. Using a unique prospective panel study of over 4500 7th grade students from South Dakota who are followed through high school, we developed propensity score weights to adjust...