En gruppe forskere har gennemgået amerikansk forskning og konkulderedet at
When focusing on studies with the highest caliber research designs, we found that inmates participating in correctional education programs were 28% less likely to recidivate when compared with inmates who did not participate in correctional education programs.
Bozick, R., Steele, J., Davis, L. et al. Does providing inmates with education improve postrelease outcomes? A meta-analysis of correctional education programs in the United States. J Exp Criminol14, 389–428 (2018). https://doi.org/10.1007/s11292-018-9334-6