A Primer on Propensity Score Analysis☆
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☆ The authors were supported in part by grant R305U070003 from the Institute for Educational Sciences, U.S. Department of Education. The second author was also supported by grants from the Spencer Foundation and W.T. Grant Foundation.
PII: S1527-3369(09)00178-0
doi:10.1053/j.nainr.2009.12.010
© 2010 Elsevier Inc. All rights reserved.
