@article{econhot_econhot-reading-09,
  title = {A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity},
  author = {Halbert White},
  journal = {Econometrica},
  year = {1980},
  volume = {48},
  number = {4},
  pages = {817},
  doi = {10.2307/1912934},
  url = {https://doi.org/10.2307/1912934}
}