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One of the most important activities in programme evaluation is impact analysis: estimation of the difference between observed programme results and the results that would have occurred in the absence of the programme. Aimed at enhancing student and practitioner understanding of research design, threats to valid inference, and ways to improve the utility of the evaluation results, Mohr's book offers unique coverage of systematic ways to find the proper goals in single and multiple outcome evaluations.Assuming some knowledge of regression analysis, Mohr explores such issues as: the interpretation of research designs within a consistent framework of regression analysis; the randomcomparison group design as an improvement ov
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