@article{Ophem:293150,
      recid = {293150},
      author = {Ophem, Hans van},
      title = {HETEROSCEDASTICITY IN SELECTIVITY MODELS},
      address = {1992-10-6},
      number = {2243-2019-3572},
      series = {AE 19/92},
      pages = {36},
      month = {Oct},
      year = {1992},
      abstract = {Selectivity models usually consist of two equations: a  linear and a qualitative variables equation. This paper  investigates the consistency of the ML-estimates of two  selectivity models in which the heteroscedasticity of the  error term of the linear equation is ignored. Homoscedastic  estimation of a heteroscedastic model is proved to yield  inconsistent estimates. Some Monte Carlo evidence is also  provided.},
      url = {http://ageconsearch.umn.edu/record/293150},
      doi = {https://doi.org/10.22004/ag.econ.293150},
}