@misc{sharma2015estimating,
  title={Estimating the Causal Impact of Recommendation Systems from Observational Data},
  author={Amit Sharma and Jake M. Hofman and Duncan J. Watts},
  year={2015},
  eprint={1510.05569},
  archivePrefix={arXiv},
  primaryClass={cs.SI},
  doi={10.1145/2764468.2764488},
  url={https://arxiv.org/abs/1510.05569}
}