Search Results for author:
Found 1 papers, 0 papers with code
Difference-in-Differences with Time-Varying Covariates in the Parallel Trends Assumption
In addition to issues related to multiple periods and variation in treatment timing that have been emphasized in the literature, we show that, even in the case with only two time periods, TWFE regressions are not generally robust to (i) paths of untreated potential outcomes depending on the level of time-varying covariates (as opposed to only the change in the covariates over time), (ii) paths of untreated potential outcomes depending on time-invariant covariates, and (iii) violations of linearity conditions for outcomes over time and/or the propensity score.
Cannot find the paper you are looking for? You can
Submit a new open access paper.
