@article{differenceindifferenceswithtimevarying1,
  title = {Difference-in-Differences when Parallel Trends Holds Conditional on Covariates},
  author = {Carolina Caetano and Brantly Callaway},
  year = {2024},
  eprint = {2406.15288},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2406.15288v2},
}