Key points are not available for this paper at this time.
Emmanuel I. Kaparakis, Stephen M. Miller, Athanasios G. Noulas, Short-Run Cost Inefficiency of Commercial Banks: A Flexible Stochastic Frontier Approach, Journal of Money, Credit and Banking, Vol. 26, No. 4 (Nov., 1994), pp. 875-893
Kaparakis et al. (Tue,) studied this question.