%0 Report
        %A Fiorini, Mario
%A Lee, Wooyong
%A Pfeifer, Gregor
        %T A Simple Approach to Staggered Difference-in-Differences in the Presence of Spillovers
        %D 2024
        %8 2024 Mar
        %I Institute of Labor Economics (IZA)
        %C Bonn
        %7 IZA Discussion Paper
        %N 16868
        %U https://www.iza.org/index.php/publications/dp16868
        %X We establish identifying assumptions and estimation procedures for the ATT in a Difference-in-Differences setting with staggered treatment adoption in the presence of spillovers. We show that the ATT can be estimated by a simple TWFE method that extends the approach of Wooldridge [2022]'s fully interacted regression model. We broaden our framework to the non-linear case of count data, offering estimation of the ATT by a simple TWFE Poisson model, and we revisit a corresponding application from the crime literature. Monte Carlo simulations show that our estimator performs competitively.
        %K Difference-in-Differences
%K staggered treatment adoption
%K spillovers
%K (non-)linear models