PSC Research Associate John M. MacDonald is now a member of the Committee on Law and Justice (CLAJ). The mission of CLAJ is to improve governmental decision making and public policy and promote the understanding and dissemination of research in matters involving laws and justice. Learn more about CLAJ and its members here.
According to analysis from John M. MacDonald and co-authors, the move decreased crime by 5 percent in the short term and 18 percent after 20-plus years. To curb gang violence in the 1990s, Los Angeles took an inventive approach, filing civil injunctions against gang “organizations.” Read more in Penn News and Journal of Quantitative Criminology.
Penny and Robert A. Fox Faculty Director of the Fels Institute
Professor of Criminology
Professor of Sociology
Ph.D., Criminology, University of Maryland, 1999