Propensity Score Matching - Statpower
Propensity Score Matching - Statpower
Propensity Score Matching - Statpower
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IntroductionModeling the CovariatesSubclassification<strong>Matching</strong>Balancing <strong>Score</strong>sThe <strong>Propensity</strong> <strong>Score</strong><strong>Matching</strong> MethodsUsing <strong>Propensity</strong> <strong>Score</strong>s – A General StrategyAn ExampleSubclassification on a Single CovariateGelman & Hill (p. 204) illustrate subclassification with a simpleexample.Suppose that the effectiveness of an educational intervention forimproving kids’ test scores was investigated in an observationalsetting where mothers chose whether or not to have theirchildren participate, and randomization was not possible.Selection bias is a fundamental problem in such a study.Multilevel<strong>Propensity</strong> <strong>Score</strong> <strong>Matching</strong>
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