@article{coverageerroroptimalconfidenceintervals,
  title = {Coverage Error Optimal Confidence Intervals for Local Polynomial Regression},
  author = {Sebastian Calonico and Matias D. Cattaneo and Max H. Farrell},
  year = {2018},
  eprint = {1808.01398},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1808.01398v4},
}