Kumbhakar, Subal C.; Parmeter, Christopher F.; Tsionas, … - In: Journal of Econometrics 172 (2013) 1, pp. 66-76
Traditional stochastic frontier models impose inefficient behavior on all firms in the sample of interest. If the data under investigation represent a mixture of both fully efficient and inefficient firms then off-the-shelf frontier models are statistically inadequate. We introduce the zero...