The Project Safe Neighborhoods (PSN) Training and Technical Assistance program developed the PSN Research in Brief
series to provide a summary report of scholarly articles, studies, and publications relevant to the PSN program. This
second issue of the PSN Research in Brief series summarizes the following study by Davis Shelfer, Christi L. Gullion, Chris
Guerra, Yan Zhang, and Jason R. Ingram published in the Justice Evaluation Journal: A Systematic Review of Project Safe
Neighborhoods Effects.