@article{econhot_econhot-cited-6cb2ed74adb69b69,
  title = {Efficient Estimation of Average Treatment Effects Using the Estimated Propensity Score},
  author = {Keisuke Hirano and Guido W. Imbens and Geert Ridder},
  journal = {Econometrica},
  year = {2003},
  volume = {71},
  number = {4},
  pages = {1161-1189},
  doi = {10.1111/1468-0262.00442},
  url = {https://doi.org/10.1111/1468-0262.00442}
}