Abstract
Communities Mobilizing for Change on Alcohol (CMCA) is a 15-community randomized trial designed to develop, implement, and evaluate a 2½ year community organizing intervention to change policies and practices of major community institutions. Pre- and post-data were collected via: surveys of high school students, surveys of youth age 18-20, surveys of alcohol retailers, alcohol purchase attempts, content analyses of media coverage, arrest and car crash indicators, surveys of strategy team members, and process records. Organizers and local strategy teams changed policies and practices of community institutions such as law enforcement agencies, alcohol merchants, and sponsors of community events, leading to significant changes in alcohol-related behaviors among 18- to 20-year-olds, and significant reductions in the propensity of alcohol establishments to serve alcohol to youth
