Transcription of SYNTHETIC DIFFERENCE IN DIFFERENCES - NBER
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SYNTHETIC DIFFERENCE IN DIFFERENCES - NBER
NBER WORKING PAPER SERIESSYNTHETIC DIFFERENCE IN DIFFERENCESD mitry ArkhangelskySusan AtheyDavid A. HirshbergGuido W. ImbensStefan WagerWorking Paper 25532 BUREAU OF ECONOMIC RESEARCH1050 Massachusetts AvenueCambridge, MA 02138 February 2019, Revised July 2021We are grateful for helpful comments and feedback from a co-editor and referees, as well as from Alberto Abadie, Avi Feller, Paul Goldsmith-Pinkham, Liyang Sun, Yiqing Xu, Yinchu Zhu, and seminar participants at several venues. This research was generously supported by ONR grant N00014-17-1-2131 and the Sloan Foundation. The R package for implementing the methods developed here is available at The associated vignette is at https://synthinference. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic least one co-author has disclosed additional relationships of potential relevance for this research.
of exogenous variation researchers have focused on statistical models that connect observed data ... and exposure to the binary treatment is denoted by W it2f0;1g. Suppose moreover that the rst N ... average of the pre-treatment outcomes …
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