How Much Bias Results if a Quasi-Experimental Design Combines Local Comparison Groups, a Pretest Outcome Measure and Other Covariates?: A Within Study Comparison of Preschool Effects

Thomas D. Cook, Naixin Zhu, Alice Klein, Prentice Starkey and Jaime Thomas

Mathematica Policy Research Reports from Mathematica Policy Research

Abstract: This study examines when nonexperiments might substitute for experiments that are done in real-world settings in order to learn what works to affect some socially valued outcome.

Keywords: quasi experiment; outcome measures; preschool (search for similar items in EconPapers)
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