Dr. Joan Petersilia has spent over 30 years studying the performance of U.S. criminal justice agencies and has been instrumental in affecting sentencing and corrections reform in California and throughout the United States. She is the author of 11 books about crime and public policy, and her research on parole reform, prisoner reintegration and sentencing policy has fueled changes in policies throughout the nation. A criminologist with a background in empirical research and social science, Dr. Petersilia is also faculty co-director for the Stanford Criminal Justice Center (SCJC), focusing on policies related to crime control, sentencing, and corrections, and developing nonpartisan analyses and recommendations intended to aid public officials, legal practitioners, and the public in understanding criminal justice policy at the state and national levels. She teaches classes at Stanford Law School on juvenile justice, prisons, community corrections, policy analysis, research methods, and criminal sentencing.
Before joining the Stanford Law School faculty, Dr. Petersilia was a professor of criminology, law and society in the School of Social Ecology at the University of California, Irvine, and director of UCI’s Center for Evidence-Based Corrections. She also previously served as a special advisor to Governor Arnold Schwarzenegger, helping to reorganize juvenile and adult corrections and working with the California State Legislature to implement prison and parole reform. She chaired Governor Schwarzenegger’s Rehabilitation Strike Team and was also co-chair of California’s Expert Panel on Offender Programs. She continues to advise the California legislature on matters related to California’s Public Safety Realignment Law of 2011 (A.B. 109), the state’s historic attempt to downsize prisons and enhance rehabilitation. She is currently the co-principal investigator of four research grants designed to assess the impacts of A.B. 109. Results from those research projects were published in November 2013 and can be found on Stanford's Criminal Justice Center website.
Dr. Petersilia is a former director of the Criminal Justice Program at the RAND Corporation; former president of the American Society of Criminology; former president of the California Association for Criminal Justice Research; former co-director of the National Research Council’s study on Community Supervision and Desistance from Crime; and former director of the National Research Council’s study on Crime Victims with Developmental Disabilities. In 2010, she was appointed by Attorney General Eric Holder to be a member of the Department of Justice Scientific Advisory Board.