Endogenous Stratification in Randomized Experiments
NBER Working Paper No. 19742
---- Acknowledgements ----
We thank Beth Akers, Josh Angrist, Matias Cattaneo, Gary Chamberlain, David Deming, Sara Goldrick- Rab, Josh Goodman, Jerry Hausman, Guido Imbens, Max Kasy, Larry Katz, Amanda Pallais, Paul Peterson, Russ Whitehurst, and seminar participants at Harvard/MIT for helpful comments and discussions, and Jeremy Ferwerda for developing estrat (available at SSC), a Stata package that calculates the leave- one-out and repeated split sample endogenous stratification estimators considered in this study. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.