THE NSW BUREAU OF CRIME STATISTICS AND RESEARCH APPLIED RESEARCH IN CRIME AND JUSTICE CONFERENCE 2015 L A S N I ER M D I N R C FE E OF TH F O G N ES I I C T U I D IV Doris Layton MacKenzie, Ph.D E Director, Penn State Justice R CT Center for Research and A Professor of Criminology Based on a paper by D.L. MacKenzie and G. Zajac, “What Works in Corrections: the Impact of Correctional Interventions on Recidivism submitted to the U.S. National Academies of Science, 2014