Reference
Léopold Simar, Ingrid Van Keilegom, and Anne Vanhems, “Unobserved heterogeneity and endogeneity in nonparametric frontier estimation”, Journal of Econometrics, vol. 190, n. 2, February 2016, pp. 360–373.
See also
Published in
Journal of Econometrics, vol. 190, n. 2, February 2016, pp. 360–373