@article{JMLR:v24:22-0341,
  author  = {Juan C. Perdomo and Akshay Krishnamurthy and Peter Bartlett and Sham Kakade},
  title   = {A Complete Characterization of Linear Estimators for Offline Policy Evaluation},
  journal = {Journal of Machine Learning Research},
  year    = {2023},
  volume  = {24},
  number  = {284},
  pages   = {1--50},
  url     = {http://jmlr.org/papers/v24/22-0341.html}
}