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If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]metanet.ch.

To cite the spefa estimator in publications use:

Giannini M (2025). “A spatial stochastic frontier model with fixed effects and endogenous environmental variables.” Spatial Economic Analysis, 20(3), 420–441. doi:10.1080/17421772.2024.2414962.

Corresponding BibTeX entry: 

  @Article{,
    title = {A spatial stochastic frontier model with fixed effects and
      endogenous environmental variables},
    author = {Massimo Giannini},
    journal = {Spatial Economic Analysis},
    year = {2025},
    volume = {20},
    number = {3},
    pages = {420--441},
    doi = {10.1080/17421772.2024.2414962},
  }

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.