Before revision: Our main contribution lies in formulation of a generalized , parametric model for stochastic frontier analysis (SFA) that nests virtually all forms used so far in the field and includes certain special cases that have not been considered so far.
After revision: Contribution of this paper lies in the formulation and estimation of a generalized , parametric model for stochastic frontier analysis (SFA) that nests virtually all forms used so far in the field and includes certain special cases that have not been considered so far.