Illinois Criminal Justice Cost-Benefit Model Development
In partnership with the Illinois Sentencing Policy Advisory Council (SPAC), and in collaboration with the Pew-MacArthur Results First Initiative, the Illinois SAC is working to implement a comprehensive cost-benefit model for the Illinois criminal justice system based on the work by the Washington State Institute of Public Policy (WSIPP). Over the course of the last two years, project staff have been collecting a range of state-specific and external criminal justice component costs and outcome measures required for the WSIPP model. These include:
- Capital costs, marginal costs, and cost escalation rates broken down, where possible, by the offense categories of murder, felony sex crimes, robbery, aggravated assault, felony property crimes, felony drug crimes, and misdemeanor offenses for each part of the criminal justice system, as well as the proportion of the cost paid for by the state;
- Probability of correctional/supervision resource use given a conviction for each offense category;
- Estimated typical duration for each resource use, and change in duration per additional sentence;
- Recidivism (reconviction) for adult probation and prison cohorts, including estimating reconviction timing for the duration of the cohort follow-up, most serious reconviction offense category probabilities, and the number of offenses and trips through the system;
- Offense, arrest, and conviction totals; victimization (National Crime Victimization Survey or state-specific);
- Costs for correctional and community-based programming.