D'esir'e K'edagni

Difference-in-Differences Models in the Presence of Time-Varying Mediators and Lagged outcomes

We study difference-in-differences (DiD) designs in which a binary treatment changes an endogenous time-varying (continuous, discrete, or mixed) mediator that in turn affects an outcome. We allow for the inclusion of lagged outcomes in the model. Under our model assumptions, we show that the usual DiD estimand mixes th...