TY  - RPRT
        AU  - Fiorini, Mario
AU  - Lee, Wooyong
AU  - Pfeifer, Gregor
        TI  - A Simple Approach to Staggered Difference-in-Differences in the Presence of Spillovers
        PY  - 2024/Mar/
        PB  - Institute of Labor Economics (IZA)
        CY  - Bonn
        T2  - IZA Discussion Paper
        IS  - 16868
        UR  - https://www.iza.org/index.php/publications/dp16868
        AB  - 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.
        KW  - Difference-in-Differences
KW  - staggered treatment adoption
KW  - spillovers
KW  - (non-)linear models
        ER  -