1. The article examines the longitudinal effects of school drug policies on student marijuana use in Washington State and Victoria, Australia.
2. It aims to determine if student marijuana use can be predicted by a school's enforcement of drug policies, responses to drug use, and emphasis on refraining from or minimizing harm of marijuana use.
3. The hypotheses are that stricter enforcement of drug policies and responses focused on refraining from use will predict lower student marijuana use over time.