Peter Wagner, Executive Director
I need your help. For more than a decade, the Prison Policy Initiative has been at the forefront of the movement to expose how mass incarceration undermines our national welfare. With a lot of hard work and generous support from a small network of individual donors, we've won major civil rights victories in local governments, state legislatures and even the Supreme Court. But our long-term viability depends on people like you investing in our work.

Can you stand up for smart and effective justice policy by joining our small network of donors today? You can make a one-time gift, or even become one of our sustaining monthly donors.

Through the end of 2014, your contribution to our work will stretch twice as far thanks to a match commitment from a small group of other donors like you.

I thank you for your investment in our work towards a more just tomorrow.
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Research Clearinghouse:

This page contains links to virtually all the empirical criminal justice research available online, organized by category and publication date. If you know what you are looking for, you may also search the database. We also have an email newsletter (at right) for new clearinghouse updates.

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Some of the most recently added reports are:

Thursday, September 18 2014:

Tuesday, September 16 2014:

  • Prisoners in 2013 [PDF] Bureau of Justice Statistics. September, 2014. "On December 31, 2013, the United States held an estimated 1,574,700 persons in state and federal prisons, an increase of approximately 4,300 prisoners (0.3%) from 2012."
  • Impact of Disproportionate Incarceration of and Violence Against Black People with Mental Health Conditions In the World's Largest Jail System, [PDF] Dignity and Power Now. August, 2014. "Nationwide, people with mental health conditions constitute 64% of the jail population, according to the Federal Bureau of Prison Statistics."

Monday, September 15 2014:

  • The Prevalence of Adverse Childhood Experiences (ACE) in the Lives of Juvenile Offenders, Office of Juvenile Justice and Delinquency Prevention. 2014. "The top three most prevalent ACE indicators were the same for both males and females: family violence, parental separation or divorce, and household member incarceration."
  • Police Officer Body-Worn Cameras [PDF] Office of Justice Programs. September, 2014. "The evaluations in Mesa and Rialto documented substantial drops in citizen complaints following deployment of the technology. The UK studies documented a similar effect."
  • Parsons v. Ryan, CV 12-00601: Arizona Class Action Prison Conditions Lawsuit Expert Reports, [PDF] ACLU of Arizona. September, 2014. "Every week, on average, a patient who has been neglected or mistreated dies in the Arizona prison system, according to these expert reports."

Thursday, September 11 2014:

  • Aging Behind Bars: Trends and Implications of Graying Prisoners in the Federal Prison System, [PDF] Urban Institute. August, 2014. "The number of prisoners age 50 or older experienced a 330 percent increase from 1994 to 2011."
  • Adventures in Risk: Predicting Violent and Sexual Recidivism in Sentencing Law, Arizona State Law Journal. March, 2014. "This Article critically analyzes the predictive abilities of actuarial risk prediction tools...A specific focus herein is the risk prediction of those criminals for whom fear is strongest: violent and sexual offenders."

Wednesday, September 10 2014:

  • Liberal but Not Stupid: Meeting the Promise of Downsizing Prisons, [PDF] Joan Petersilia and Francis T. Cullen, Stanford Journal of Criminal Law and Policy. June, 2014. "The issue of downsizing will also remain at the forefront of correctional discourse because of the court-ordered reduction in imprisonment in California...a 'criminology of downsizing' must be developed to foster effective policy interventions."
  • Massachusetts Department of Correction Prison Population Trends 2013 [PDF] Massachusetts Department of Correction. May, 2014. "A steady decline from January 2012 to January 2014 reflects a seven percent decrease in the custody population."
  • California Prison Downsizing and Its Impact on Local Criminal Justice Systems, [PDF] Joan Petersilia, Harvard Law & Policy Review. 2014. "Everyone agreed county officials are working more collaboratively toward reducing recidivism, and that new funding has fostered innovative programming. But our interviews also found counties carry out an initiative...imposed overnight."

Friday, September 5 2014:

  • Race and Prosecution in Manhattan Vera Institute of Justice. July, 2014. (Blacks and Latinos were particularly likely to be held in pretrial detention for misdemeanor person offenses, followed by misdemeanor drug offenses. Blacks and Latinos were also most likely to have their cases dismissed for misdemeanor drug offenses.)
  • State Variation in Hospital Use and Cost of Firearm Assault Injury, 2010 [PDF] Urban Institute. August, 2014. (Hospital use for firearm-assault injury is disproportionately concentrated among young males, particularly young black males, in all six study states.)

Thursday, September 4 2014:

  • Close-Range Gunfire around DC Schools [PDF] Urban Institute. September, 2014. "Fifty-four percent of DC schools covered by gunfire-detection technology had at least one burst of gunfire occur within 1,000 feet of the school."
  • Does Immigration Enforcement Reduce Crime? Evidence from "Secure Communities", [PDF] University of Chicago Law; New York University Law School. August, 2014. "Our results show that Secure Communities has led to no meaningful reductions in the FBI index crime rate."
  • Policing Immigration [PDF] New York University School of Law; University of Chicago Law School. 2013. "The data undermine the government's claim that Secure Communities is principally about making communities more secure from crime."
  • Race and Punishment: Racial Perceptions of Crime and Support for Punitive Policies, [PDF] Sentencing Project. September, 2014. "Studies have shown that whites who associate crime with blacks and Latinos are more likely to support punitive policies - including capital punishment and mandatory minimum sentencing - than whites with weaker racial associations of crime."