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: Our main contribution lies in formulation of a generalized , parametric model for stochastic frontier analysis (SFA) that nests virtually all forms used and includes some that have not been considered so far.