The College Alcohol Study has conducted three national surveys throughout the 1990s. They included 17,592 students in 1993, 15,685 in 1997, and 14,941 in 1999. Students at 140 four-year colleges and universities in 40 states and the District of Columbia participated. The national surveys asked students about their drinking behavior, reasons for drinking, and high school drinking experience. Students who drank in college were asked about alcohol-related problems they experienced, and all students were asked about the consequences of other students drinking. The 2000 CAS Monograph provides a complete summary of the College Alcohol Study findings from these national surveys.