@article{twowayfixedeffectsanddifferencesin,
  title = {Two-Way Fixed Effects and Differences-in-Differences with Heterogeneous Treatment Effects: A Survey},
  author = {Clément de Chaisemartin and Xavier D'Haultfœuille},
  year = {2021},
  eprint = {2112.04565},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2112.04565v6},
}