Difference-in-Differences with Variation in Treatment Timing
NBER Working Paper No. 25018
---- Acknowledgments ----
I thank Michael Anderson, Martha Bailey, Marianne Bitler, Brantly Callaway, Kitt Carpenter, Eric Chyn, Bill Collins, John DiNardo, Andrew Dustan, Federico Gutierrez, Brian Kovak, Emily Lawler, Doug Miller, Sayeh Nikpay, Pedro Sant’Anna, Jesse Shapiro, Gary Solon, Isaac Sorkin, Sarah West, and seminar participants at the Southern Economics Association, ASHEcon 2018, the University of California, Davis, University of Kentucky, University of Memphis, University of North Carolina Charlotte, the University of Pennsylvania, and Vanderbilt University. All errors are my own. The views expressed herein are those of the author and do not necessarily reflect the views of the National Bureau of Economic Research.