Stegmann, Tim. 2008. “Analyzing an Active Labor Market Program in Germany: A Regional Approach—An Attempt to Use Propensity Score Matching for the Estimation of Causal Effects on the Level of Counties and Independent Cities”. Journal of MultiDisciplinary Evaluation 6 (11). Kalamazoo, MI:56-70. https://doi.org/10.56645/jmde.v6i11.196.