Clarke, Damian; Pailañir, Daniel; Athey, Susan; … - 2023
units are available over time. We lay out the theory underlying SDID, both when there is a single treatment adoption date … and when adoption is staggered over time, and discuss estimation and inference in each of these cases. We introduce the … sdid command which implements these methods in Stata, and provide a number of examples of use, discussing estimation …