Today, Arnold Ventures and the CUNY Institute for State and Local Governance (ISLG) announced the release of action research reports from the 10 jurisdictions selected to participate in the Reducing Revocations Challenge: Cook County, IL; Denver, CO; Harris County, TX; Monroe County; IN; Niagara County, NY; Pima County, AZ; Pulaski County, AK; Ramsey County, MN; Santa Cruz County, CA; and Spokane, WA. The Challenge is a national initiative dedicated to transforming probation supervision to improve client outcomes and reduce unnecessary incarceration. The Challenge was launched in response to the growing recognition that revocations from supervision are a major contributor to mass incarceration, responsible for almost half of state prison admissions nationwide, and reform is urgently needed.