@article{econhot_econhot-cited-d36aeaaa4ef481b6,
  title = {On estimating firm-level production functions using proxy variables to control for unobservables},
  author = {Jeffrey M. Wooldridge},
  journal = {Economics Letters},
  year = {2009},
  volume = {104},
  number = {3},
  pages = {112-114},
  doi = {10.1016/j.econlet.2009.04.026},
  url = {https://doi.org/10.1016/j.econlet.2009.04.026}
}