Overall rates of any past-30-days drinking, heavy episodic drinking, and usual heavy drinking among past-
30-days drinkers were all lower in 2001 compared to 1999. School-level analyses (N = 11) found deans’ baseline
reports of stricter enforcement were strongly correlated with subsequent declines in heavy episodic drinking
(Pearson’s r = -0.73, p = 0.011). Moreover, consistently high enforcement levels across time, as reported by deans,
were associated with greater declines in heavy episodic drinking. Such relationships were not found for students’ and
security chiefs’ reports of enforcement. Marijuana use did not rise during this period of decline in heavy drinking