Introduction to PSM: Practical Issues, Concerns, & Strategies [ppt] Introduction to Propensity Score Matching: A Review and Illustration [ppt] Running Propensity Score Matching with STATA/PSMATCH2 [doc] PSM References [doc] Propensity Score Matching to Evaluate the Impact of Substance Abuse Treatment Services for Child Welfare Clients [ppt] Substance Abuse among Caregivers Involved with Child Welfare Services: Prevalence and Identification by Child Welfare Workers [ppt] Substance Abuse and Child Welfare Services: Research Update and Needs - 1 [ppt] & 2 [ppt]