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Tipton, Elizabeth; Sullivan, Kate; Hedges, Larry; Vaden-Kiernan, Michael; Borman, Geoffrey; Caverly, Sarah – Society for Research on Educational Effectiveness, 2011
In this paper the authors present a new method for sample selection for scale-up experiments. This method uses propensity score matching methods to create a sample that is similar in composition to a well-defined generalization population. The method they present is flexible and practical in the sense that it identifies units to be targeted for…
Descriptors: Sampling, Selection, Research Methodology, Reading Programs