Nber Working Paper Series Estimating Treatment Effects from Contaminated Multi-period Education Experiments: the Dynamic Impacts of Class Size Reductions
نویسندگان
چکیده
This paper introduces an empirical strategy to estimate dynamic treatment effects in randomized trials that provide treatment in multiple stages and in which various noncompliance problems arise such as attrition and selective transitions between treatment and control groups. Our approach is applied to the highly influential four year randomized class size study, Project STAR. We find benefits from attending small class in all cognitive subject areas in kindergarten and the first grade. We do not find any statistically significant dynamic benefits from continuous treatment versus never attending small classes following grade one. Finally, statistical tests support accounting for both selective attrition and noncompliance with treatment assignment. Weili Ding Queens University 138 Union Street Policy Studies Building Kingston Ontario K7L 3N6 Canada [email protected] Steven F. Lehrer School of Policy Studies and Department of Economics Queen's University Kingston, Ontario K7L, 3N6 CANADA and NBER [email protected]
منابع مشابه
Estimating Treatment Effects from Contaminated Multi-Period Education Experiments: The Dynamic Impacts of Class Size Reductions
This paper introduces an empirical strategy to estimate dynamic treatment effects in randomized trials that provide treatment in multiple stages and in which various noncompliance problems including attrition and selective transitions between treatment and control groups arise. Our approach is applied to the highly influential four year randomized class size study, Project STAR. We find benefit...
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