Lang, Günter; Welzel, Peter - In: Journal of Productivity Analysis 10 (1998) 1, pp. 63-84
Using 1992 data of 1490 banks covering about 40% of German banking, we specify a multi-product translog cost function and follow the “thick frontier”-approach to control for cost inefficiency when evaluating the technology of banking. Scale economies are found to exist up to a size of about...