John M. MacDonald


  • John MacDonald (PSC) discusses his new book, grounded in years of research on the positive effects of remediation like fixing up abandonded lots and houses. Read more in Penn Today.

  • 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

Research Themes


  • Penn Arts and Sciences 60-Second Lecture: John M. MacDonald on Using Science to Design Safer and Healthier Cities
  • Penn Law School's Third Visual Legal Advocacy Roundtable: John M. MacDonald on Making Sense of Surveillance and Vérité Footage from the Streets