Galán, Jorge; Veiga, Helena; Wiper, Michael - In: Journal of Productivity Analysis 42 (2014) 1, pp. 85-101
Estimation of the one sided error component in stochastic frontier models may erroneously attribute firm characteristics to inefficiency if heterogeneity is unaccounted for. However, unobserved inefficiency heterogeneity has been little explored. In this work, we propose to capture it through a...