This paper examines a natural experiment in which students at a large state university were randomly assigned roommates … students who drink frequently are particularly influenced by frequent-drinking roommates, substance-free housing programs could … possibly even grows over time. In contrast, students' college GPA is not influenced by roommates' high school grades, admission …

alcohol has a negative effect on the grades of university students. Likewise, there is evidence that marijuana use reduces the … academic performance of university students. Although students who use illicit substances are more likely to drop out of high …

This paper examines a natural experiment in which students at a large state university were randomly assigned roommates … students who drink frequently are particularly influenced by frequent-drinking roommates, substance-free housing programs could … possibly even grows over time. In contrast, students' college GPA is not influenced by roommates' high school grades, admission …