David B. Wilson, PhD, is Professor and Chair of the Department of Criminology, Law and Society, at George Mason University. His PhD is in applied social psychology from Claremont Graduate University with an emphasis on program evaluation. His research interests are the effectiveness of offender rehabilitation and crime prevention efforts, program evaluation methodology, and meta-analysis. His research has included a broad range of topics, including the effectiveness of juvenile curfews, juvenile delinquency interventions, school-based prevention programs, correctional boot-camps, court-mandated batterer intervention programs, drug-courts, the effects of sugar on children’s behavior, and the effects of alcohol on violent behavior. He is editor of systematic reviews for the Journal of Experimental Criminology, editor for the Crime and Justice Group of the Campbell Collaboration, and a past consulting editor for Psychological Bulletin. He was awarded the Marcia Guttentag Award for Early Promise as an Evaluator by the American Evaluation Association and the Frederick Mosteller Award for Distinctive Contributions to Systematic Reviewing by the Campbell Collaboration.