@article{ensemblemethodsforcausaleffectsinpanel,
  title = {Ensemble Methods for Causal Effects in Panel Data Settings},
  author = {Susan Athey and Mohsen Bayati and Guido Imbens and Zhaonan Qu},
  year = {2019},
  eprint = {1903.10079},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1903.10079v1},
}