Download This PaperA Simple Approximation for Evaluating External Validity Bias
62 Pages Posted: 18 Sep 2017 Last revised: 6 Feb 2023
Date Written: September 2017
Abstract
We develop a simple approximation that relates the total external validity bias in randomized trials to (i) bias from selection on observables and (ii) a measure for the role of treatment effect heterogeneity in driving selection into the experimental sample.
Suggested Citation: Suggested Citation
Andrews, Isaiah and Oster, Emily, A Simple Approximation for Evaluating External Validity Bias (September 2017). NBER Working Paper No. w23826, Available at SSRN: https://ssrn.com/abstract=3038614
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