A FDH super-efficiency model

The free disposal hull (FDH) model, developed by Deprins et al. [The Performance of Public Enterprises Concepts and Measurements, Elsevier, 1984], is derived from a representation of the production technology where production plans satisfy strong disposability of inputs and outputs but without the convexity assumption. This paper contributes to the FDH literature by proposing FDH super-efficiency models that may become infeasible. We modify the proposed models to handle the infeasibility case as well as adjusting the corresponding measures of those DMUs that suffer from the infeasibility problem. The paper concludes with a comprehensive empirical study to illustrate the details and applicability of the proposed models.