In another community-based program evaluation, 15 Midwestern communities were randomized to a community organizing program ("Communities Mobilizing for Change on Alcohol") or control condition (Wagenaar, Murray, & Toomey, 2000). Community organizers, hired in each program community, worked with several community institutions, including local public officials, law enforcement, alcohol merchants, the media, and local schools, to affect community policies and reduce underage access to alcohol over the course of 2.5 years. During the program implementation period, there were changes in alcohol retail policies and practices, in media attention to alcohol issues, and in law enforcement practices. The study authors obtained city data on arrests and traffic crashes for the six years prior to and the three years spanning the program implementation. When compared with the control communities, the program communities saw a decline in drunk driving arrests among young people ages 18 to 20 years and among adolescents between the ages of 15 and 17 years. There was no measurable impact on MVCs, although the authors note that the study did not have a strong ability to detect any changes in MVC occurrence.