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Can Circles of Support and Accountability (CoSA) Significantly Reduce Sexual Recidivism? Results from a Randomized Control Trial in Minnesota
"This study evaluates the effectiveness of Minnesota Circles of Support and Accountability (MnCOSA), a sex offender reentry program implemented by the Minnesota Department of Corrections in 2008.

Using a randomized controlled trial, this study compares recidivism and cost–benefit outcomes among sex offenders in the MnCOSA (N = 50) and control groups (N = 50).

The results suggest MnCOSA significantly reduced sexual recidivism, lowering the risk of rearrest for a new sex offense by 88%. In addition, MnCOSA significantly decreased all four measures of general recidivism, with reductions ranging in size from 49 to 57%. As a result of the reduction in recidivism, findings from the cost–benefit analysis reveal the program has generated an estimated $2 million in costs avoided to the state, resulting in a benefit of $40,923 per participant. For every dollar spent on MnCOSA, the program has yielded an estimated benefit of $3.73."

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