New Evidence on the Finite Sample Properties of Propensity Score Reweighting and Matching Estimators∗
نویسندگان
چکیده
Frölich (2004) compares the finite sample properties of reweighting and matching estimators of average treatment effects and concludes that reweighting performs far worse than even the simplest matching estimator. We argue that this conclusion is unjustified. Neither approach dominates the other uniformly across data generating processes (DGPs). Expanding on the Frölich’s (2004) analysis, this paper analyzes empirical as well as hypothetical DGPs and examines misspecification. We conclude that reweighting is competitive with the most effective matching estimators when overlap is good, but that matching may be more effective when overlap is sufficiently poor. JEL Classification: C21
منابع مشابه
New Evidence on the Finite Sample Properties of Propensity Score Matching and Reweighting Estimators
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