Regularity conditions and scope estimates: The case of large-sized U.S. banks |
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| Authors: | Athanasios G. Noulas Stephen M. Miller Subhash C. Ray |
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| Affiliation: | (1) Economics, Department of Economics, Seton Hall University, 07079-2692 South Orange, NJ, USA;(2) Department of Economics, University of Connecticut, Box U-63, 06269-1063 Storrs, CT, USA;(3) Department of Economics, University of Connecticut, Box U-63, 06269-1063 Storrs, CT, USA |
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| Abstract: | We consider economies and diseconomies of scope for large U.S. banks by employing ordinary and hybrid translog cost functions. We examine the regularity conditions in output space where scope estimates are calculated and reject all models for which these conditions fail. The translog model always possesses violations. For the hybrid translog, violations occur in every case except one. In this one case, we find economies of scope. |
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