@article{syntheticdifferenceindifferences,
  title = {Synthetic Difference In Differences Estimation},
  author = {Damian Clarke and Daniel Pailañir and Susan Athey and Guido Imbens},
  year = {2023},
  eprint = {2301.11859},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2301.11859v3},
}