Cannabis use and mental health problems

Abstract

This paper investigates whether cannabis use leads to worse mental health. To do so, we account for common unobserved factors affecting mental health and cannabis consumption by modeling mental health jointly with the dynamics of cannabis use. Our main finding is that using cannabis increases the likelihood of mental health problems, with current use having a larger effect than past use. The estimates suggest a dose-response relationship between the frequency of recent cannabis use and the probability of currently experiencing a mental health problem. © 2010 John Wiley & Sons, Ltd.