Dr. Paul J. Gruenewald has worked as a Senior Research Scientist at Prevention Research Center, Pacific Institute for Research and Evaluation, since 1987. His research interests focus upon studies of the social, economic and physical availability of alcohol, alcohol use and alcohol-related problems. Additional foci of his work include mathematical and statistical models of alcohol use and related problems, the development of evaluation methodologies appropriate to community-based evaluations of preventive interventions, and the environmental prevention of violence. Dr. Gruenewald is currently