@article{estimatingtreatmenteffectsusingmultiple,
  title = {Estimating Treatment Effects using Multiple Surrogates: The Role of the Surrogate Score and the Surrogate Index},
  author = {Susan Athey and Raj Chetty and Guido Imbens and Hyunseung Kang},
  year = {2016},
  eprint = {1603.09326},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1603.09326v5},
}