A portrait of Peter Wagner.
Peter Wagner
Executive Director
I need your help. The Prison Policy Initiative is at the forefront of the movement for criminal justice reform. We've protected our democracy from the prison system and the poorest families in this country from the predatory prison telephone industry. And our timely and accessible reports recruit new and stronger allies to our movement.

our long-term viability depends on people like you investing in our work.

Some of our other supporters will match every gift made through the end of the year. Can you stand up for smart and effective criminal justice policy with a gift today?

I thank you for investing in our work towards a more just tomorrow.
—Peter Wagner
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Research Clearinghouse:

Beyond producing original research, the Prison Policy Initiative edits several databases to empower activists, journalists, and policymakers to shape effective criminal justice policy. 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 research clearinghouse updates.

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Enter one word from the title, author or topic to search the clearinghouse:

Advanced search options and entire database by the date added.

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Some of the most recently added reports are:

Wednesday, November 25 2015:

  • From Silo to System: What Makes a Criminal Justice System Operate Like a System?, [PDF] The Justice Management Institute. April, 2015. "JMI conducted in-depth interviews with and collected quantitative and qualitative data from eight county-based criminal justice systems that have been cited over the years as being "highly effective.""
  • Justice in Katrina's Wake: Changing Course on Incarceration in New Orleans, Vera Institute of Justice. November, 2015. "This report documents the groundbreaking reforms that the City of New Orleans has engaged in to safely decrease its use of detention, from reducing the physical size of its jail to implementing risk-based pretrial release practices."
  • Prison Price Tag: The High Cost of Wisconsin's Corrections Policies, Wisconsin Budget Project. November, 2015. "Wisconsin state and local governments spend about $1.5 billion on corrections each year, significantly more than the national average given the size of our state."

Thursday, November 19 2015:

  • Predicting Crime through Incarceration: The Impact of Rates of Prison Cycling On Rates of Crime in Communities, [PDF] National Institute of Justice. May, 2014. (The study found strong support for the impact of prison cycling on neighborhood crime rates, i.e., when resident removal rates due to incarceration were high, crime rates decreased; when reentry rates were high in a neighborhood, the crime rate increased.)
  • Suspended Childhood: An Analysis of Exclusionary Discipline of Texas' Pre-K and Elementary School Students, Texas Appleseed. November, 2015. "In the 2013-2014 school year, Texas schools issued 88,310 out-of-school suspensions to young children."
  • Hot Spots Policing George Mason University Center for Evidence-Based Crime Policy. 2015. "Hot spots policing covers a range of police responses that all share in common a focus of resources on the locations where crime is highly concentrated."
  • Evaluation of the Shreveport Predictive Policing Experiment RAND Corporation. 2014. "The program did not generate a statistically significant reduction in property crime."
  • Predictive Policing: The Role of Crime Forecasting in Law Enforcement Operations, [PDF] RAND Corporation. 2013. "Predictive policing is the application of analytical techniques--particularly quantitative techniques--to identify likely targets for police intervention and prevent crime or solve past crimes by making statistical predictions."
  • Prison Time Surges for Federal Inmates The Pew Charitable Trusts Public Safety Performance Project. November, 2015. "The average length of time served by federal inmates more than doubled from 1988 to 2012, rising from 17.9 to 37.5 months."
  • States of Women's Incarceration: The Global Context, Prison Policy Initiative. November, 2015. "When compared to jurisdictions across the globe, even the U.S. states with the lowest levels of incarceration are far out of line."

Wednesday, November 18 2015:

  • First Do No Harm: Advancing Public Health in Policing Practices, [PDF] Vera Institute of Justice. November, 2015. (This report details the cultural divide among system actors that amplify and sustain these problems and offers recommendations on how law enforcement policymakers and practitioners can enhance both public safety and community health.)
  • Police Use of Nonfatal Force, 2002-11 [PDF] Bureau of Justice Statistics. November, 2015. "Of those who had contact, 1.6% experienced the threat or use of nonfatal force by the police during their most recent contact."
  • Investigation of the Newark Police Department [PDF] United States Department of Justice Civil Rights Division. July, 2014. "Approximately 75% of reports of pedestrian stops by NPD officers failed to articulate sufficient legal basis for the stop, despite the NPD policy requiring such justification."

Tuesday, November 17 2015:

  • Hate Crime Statistics, 2014 Federal Bureau of Investigation. November, 2015. "Of the 5,462 single-bias incidents reported in 2014, 47 percent were racially motivated. Other motivators included sexual orientation, religion, ethnicity, gender identity, disability, and gender."
  • State Firearm Legislation and Nonfatal Firearm Injuries [PDF] American Journal of Public Health. August, 2015. "There is significant variation in state-level hospital discharge rates for nonfatal firearm injuries, and stricter state firearm legislation is associated with lower discharge rates for such injuries."

Monday, November 16 2015:

  • Proposition 47 Progress Report: Year One Implementation, [PDF] Stanford Law School Stanford Justice Advocacy Project. October, 2015. "Since the enactment of Proposition 47 on November 14, 2014, the number of people incarcerated in California’s prisons and jails has decreased by approximately 13,000 inmates, helping alleviate crowding conditions in those institutions."
  • Changing Gears: California's Shift to Smart Justice, [PDF] ACLU of California. November, 2015. "By June 2015, almost 160,000 petitions had been filed to reduce a felony to a misdemeanor."

Friday, November 13 2015:

  • Who Gets Time for Federal Drug Offenses? Data Trends and Opportunities for Reform, Urban Institute. November, 2015. (This brief finds that many people in federal prison for drug crimes have minimal or no criminal histories, and most were not convicted of violent or leading roles.)

Thursday, November 12 2015:

  • Does Parole Supervision Work? Research Findings and Policy Opportunities, Urban Institute. March, 2006. (This article begins with an argument for why we should study supervision and concludes with some thoughts about policy opportunities for the field, arguing that the current focus on prisoner reentry provides a timely opportunity to "reinvent" parole.)

Wednesday, November 11 2015:

  • Battle Scars: Military Veterans and the Death Penalty, Death Penalty Information Center. November, 2015. "Although a definitive count has yet to be made, approximately 300 veterans are on death row today, and many others have already been executed."
  • Policing for Profit: The Abuse of Civil Asset Forfeiture, Institute for Justice. November, 2015. "In 1986, the Department of Justice’s Assets Forfeiture Fund took in $93.7 million in revenue from federal forfeitures. By 2014, annual deposits had reached $4.5 billion--a 4,667 percent increase."
  • Citizens Police Data Project Invisible Institute. 2015. "28,567 allegations of misconduct were filed against Chicago Police Department officers between March 2011 and September 2015."
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