Frontier Estimation and Firm-Specific Inefficiency Measures in the Presence of Heteroscedasticity
异方差下的前沿估计与企业特定无效率测度
The purpose of this paper is to illustrate a straightforward and useful method for addressing the problem of heteroscedasticity in the estmation of frontiers. A heteroscedastic cost frontier model is developed and estimated using bank cost data similar to that used by G. D. Ferrier and C. A. K. Lovell (1990). The authors' results show dramatic changes in the estimated cost frontier and in the inefficieny measures when accounting for heteroscedasticity in the estimation…