@article{Chaisemartin2020,
author = {Chaisemartin, C. and d’Haultfoeuille, X.},
title= {Two-way fixed effects estimators with heterogeneous treatment effects},
year = {2020},
doi = {10.1257/aer.20181169},
volume = {110},
number = {9},
pages = {2964--2996},
}