TY - JOUR TI - Doubly robust difference-in-differences estimators AU - Pedro H. C. Sant’Anna AU - Jun B. Zhao JO - Journal of Econometrics PY - 2020 VL - 219 IS - 1 DO - 10.1016/j.jeconom.2020.06.003 UR - https://doi.org/10.1016/j.jeconom.2020.06.003 ER -