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Returns to scale and input substitution for large US banks
Noulas, Athanasios G., (1990)
Vertical integration and power generation in the United States
Eftekhari, Hossein, (1989)
Technical progress, inefficiency, and productivity change in US banking, 1984 - 1993
Wheelock, David C., (1999)
The technical efficiency of large bank production
Miller, Stephen M., (1996)
Short-run cost inefficiency of commercial banks : a flexible stochastic frontier approach
Kaparakis, Emmanuel I., (1994)