@article{Callaway2021,
  author    = {Callaway, Brantly and Sant'Anna, Pedro H. C.},
  title     = {Difference-in-Differences with Multiple Time Periods},
  journal   = {Journal of Econometrics},
  volume    = {225},
  number    = {2},
  pages     = {200--230},
  year      = {2021},
  doi       = {10.1016/j.jeconom.2020.12.001}
}

@article{Sun2021,
  author    = {Sun, Liyang and Abraham, Sarah},
  title     = {Estimating Dynamic Treatment Effects in Event Studies with Heterogeneous Treatment Effects},
  journal   = {Journal of Econometrics},
  volume    = {225},
  number    = {2},
  pages     = {175--199},
  year      = {2021},
  doi       = {10.1016/j.jeconom.2020.09.006}
}

@article{Borusyak2024,
  author    = {Borusyak, Kirill and Jaravel, Xavier and Spiess, Jann},
  title     = {Revisiting Event-Study Designs: Robust and Efficient Estimation},
  journal   = {Review of Economic Studies},
  volume    = {91},
  number    = {6},
  pages     = {3253--3285},
  year      = {2024},
  doi       = {10.1093/restud/rdae007}
}

@misc{Gardner2022,
  author    = {Gardner, John},
  title     = {Two-Stage Differences in Differences},
  year      = {2022},
  eprint    = {2207.05943},
  archiveprefix = {arXiv},
  primaryclass  = {econ.EM}
}

@article{Arkhangelsky2021,
  author    = {Arkhangelsky, Dmitry and Athey, Susan and Hirshberg, David A. and Imbens, Guido W. and Wager, Stefan},
  title     = {Synthetic Difference-in-Differences},
  journal   = {American Economic Review},
  volume    = {111},
  number    = {12},
  pages     = {4088--4118},
  year      = {2021},
  doi       = {10.1257/aer.20190159}
}

@article{Rambachan2023,
  author    = {Rambachan, Ashesh and Roth, Jonathan},
  title     = {A More Credible Approach to Parallel Trends},
  journal   = {Review of Economic Studies},
  volume    = {90},
  number    = {5},
  pages     = {2555--2591},
  year      = {2023},
  doi       = {10.1093/restud/rdad018}
}

@article{Roth2022,
  author    = {Roth, Jonathan},
  title     = {Pretest with Caution: Event-Study Estimates after Testing for Parallel Trends},
  journal   = {American Economic Review: Insights},
  volume    = {4},
  number    = {3},
  pages     = {305--322},
  year      = {2022},
  doi       = {10.1257/aeri.20210236}
}

@article{GoodmanBacon2021,
  author    = {Goodman-Bacon, Andrew},
  title     = {Difference-in-Differences with Variation in Treatment Timing},
  journal   = {Journal of Econometrics},
  volume    = {225},
  number    = {2},
  pages     = {254--277},
  year      = {2021},
  doi       = {10.1016/j.jeconom.2021.03.014}
}

@article{deChaisemartin2020,
  author    = {{de Chaisemartin}, Cl\'{e}ment and D'Haultf{\oe}uille, Xavier},
  title     = {Two-Way Fixed Effects Estimators with Heterogeneous Treatment Effects},
  journal   = {American Economic Review},
  volume    = {110},
  number    = {9},
  pages     = {2964--2996},
  year      = {2020},
  doi       = {10.1257/aer.20181169}
}

@article{Wooldridge2025,
  author    = {Wooldridge, Jeffrey M.},
  title     = {Two-Way Fixed Effects, the Two-Way {Mundlak} Regression, and Difference-in-Differences Estimators},
  journal   = {Empirical Economics},
  volume    = {69},
  number    = {5},
  pages     = {2545--2587},
  year      = {2025}
}

@article{Wooldridge2023,
  author    = {Wooldridge, Jeffrey M.},
  title     = {Simple Approaches to Nonlinear Difference-in-Differences with Panel Data},
  journal   = {The Econometrics Journal},
  volume    = {26},
  number    = {3},
  pages     = {C31--C66},
  year      = {2023},
  doi       = {10.1093/ectj/utad016}
}

@techreport{Wing2024,
  author    = {Wing, Coady and Freedman, Seth M. and Hollingsworth, Alex},
  title     = {Stacked Difference-in-Differences},
  institution = {National Bureau of Economic Research},
  type      = {Working Paper},
  number    = {32054},
  year      = {2024},
  url       = {https://www.nber.org/papers/w32054}
}

@techreport{Callaway2024,
  author    = {Callaway, Brantly and Goodman-Bacon, Andrew and Sant'Anna, Pedro H. C.},
  title     = {Difference-in-Differences with a Continuous Treatment},
  institution = {National Bureau of Economic Research},
  type      = {Working Paper},
  number    = {32117},
  year      = {2024}
}

@misc{Chen2025,
  author    = {Chen, Xun and Sant'Anna, Pedro H. C. and Xie, Haitian},
  title     = {Efficient Difference-in-Differences and Event Study Estimators},
  year      = {2025},
  note      = {Working paper}
}

@misc{Athey2025,
  author    = {Athey, Susan and Imbens, Guido W. and Qu, Zhaonan and Viviano, Davide},
  title     = {Triply Robust Panel Estimators},
  year      = {2025},
  eprint    = {2508.21536},
  archiveprefix = {arXiv},
  primaryclass  = {econ.EM}
}

@misc{OrtizVillavicencio2025,
  author    = {Ortiz-Villavicencio, Marco and Sant'Anna, Pedro H. C.},
  title     = {Better Understanding Triple Differences Estimators},
  year      = {2025},
  eprint    = {2505.09942},
  archiveprefix = {arXiv},
  primaryclass  = {econ.EM}
}

@article{Roth2023,
  author    = {Roth, Jonathan and Sant'Anna, Pedro H. C. and Bilinski, Alyssa and Poe, John},
  title     = {What's Trending in Difference-in-Differences? {A} Synthesis of the Recent Econometrics Literature},
  journal   = {Journal of Econometrics},
  volume    = {235},
  number    = {2},
  pages     = {2218--2244},
  year      = {2023},
  doi       = {10.1016/j.jeconom.2023.03.008}
}

@misc{Baker2025,
  author    = {Baker, Andrew C. and Larcker, David F. and McClure, Charles G. and Saraph, Durgesh and Watts, Edward M.},
  title     = {Difference-in-Differences Designs: A Practitioner's Guide},
  year      = {2025},
  eprint    = {2503.13323},
  archiveprefix = {arXiv},
  primaryclass  = {econ.EM}
}

@article{Lumley2004,
  author    = {Lumley, Thomas},
  title     = {Analysis of Complex Survey Samples},
  journal   = {Journal of Statistical Software},
  volume    = {9},
  number    = {8},
  pages     = {1--19},
  year      = {2004},
  doi       = {10.18637/jss.v009.i08}
}

@manual{Berge2018,
  author    = {Berg\'{e}, Laurent},
  title     = {fixest: Fast Fixed-Effects Estimations},
  year      = {2018},
  note      = {R package},
  url       = {https://CRAN.R-project.org/package=fixest}
}
