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Efficiency characterizations in different DEA models |
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| Authors: | Taesik Ahn Abraham Charnes and William W Cooper |
| Institution: | a School of Accountancy, College of Business, Arizona State University, Tempe, AZ 85287, U.S.A. b Center for Cybernetic Studies, College of Business Administration, The University of Texas at Austin, TX 78712-1177, U.S.A. |
| Abstract: | Relations of efficiency and non-efficiency for the same sets of DMUs (Decision Making Units) are developed for the Charnes, Cooper and Rhodes (CCR) and Barker, Charnes, Cooper (BCC) ratio models, as well as DEA Additive and Multiplicative Models. Surprisingly, additively efficient DMUs are not necessarily multiplicatively efficient. A geometric “stretching” phenomenon is identified for the latter case. |
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