A March 2011 study, through the federal Office of Juvenile Justice and Delinquency Prevention, (OJJDP) concludes that long-term juvenile incarceration does not decrease reoffending, and may actually increase recidivism rates for lower-level youth offenders.
Long-term incarceration does not reduce the likelihood that serious youth offenders will reoffend. The evidence points to the contrary; that for lower-level offenders, longer stays in institutions will increase reoffending rates.
Community-based interventions and services like substance-abuse programs are much more effective at improving long-term outcomes for youthful offenders. Sustained aftercare and supervision is also a critical ingredient in determining positive long-term outcomes. more at: California Progress Report: