This study is examining the relative effects of alternative aftercare models for ex-offenders who are recovering from substance abuse/addiction. The study is a longitudinal, randomized field trial that assigns participants to one of three conditions: Oxford House, a professionally-run residential treatment facility, or a control condition that involves usual aftercare chosen by participants (which may include no treatment at all). Oxford Houses are self-run residential recovery homes based on the premise of mutual support. These homes do not involve professional treatment staff and the expenses (e.g. rent, utilities) are paid for by the residents. The hypothesis of this study is that Oxford House participants will have as good or better outcomes in terms of substance recovery, recidivism, and health in comparison to the participants who were assigned to the residential treatment facility, and better outcomes in comparison to the control group. In addition, the cost to government/tax payers will be substantially lower given that participants pay their own way.

Inclusion Criteria:

• released from prison/jail in last 24 months
• recovering from alcohol or drug dependence

Exclusion Criteria:

• convicted of violent crime such as murder, aggravated assault
• currently using alcohol or drugs