@article{differenceindifferenceswithacontinuous,
  title = {Difference-in-Differences with a Continuous Treatment},
  author = {Brantly Callaway and Andrew Goodman-Bacon and Pedro H. C. Sant'Anna},
  year = {2021},
  eprint = {2107.02637},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2107.02637v7},
}