abstract: The dissertation examines treatment services received by youth on probation in the Maricopa County, Arizona. The project focuses on three primary issues: 1) the factors associated with receiving treatment services while on probation, 2) the factors associated with receiving treatment services through different funding streams, and 3) whether treatment services and specific characteristics of treatment services, particularly the funding source, influence recidivism outcomes of youth. To answer these questions the research used data obtained from the Maricopa County Juvenile Probation Department from July 2012 thru August 2014. Multivariate regression, along with statistical techniques to control for selection bias, were used to identify the factors associated with receiving treatment services, the factors associated with the funding source of treatment services, and the effect of treatment services on recidivism. The findings from the current dissertation suggest that the receipt of treatment services is not equal across groups, and particularly that minorities are less likely to receive treatment services compared to their White counterparts. Additionally, the findings reveal that certain characteristics of youth and the type of treatment service received influence the funding source, but the source of funding does not influence the effectiveness of the treatment services. Finally, using propensity score matching, the current dissertation found that treatment services were effective in reducing recidivism while under probation supervision and 6 months after probation supervision has ended. Implications for policy and research are discussed in light of these findings. / Dissertation/Thesis / Doctoral Dissertation Criminology and Criminal Justice 2015