Article ID: | iaor20032120 |
Country: | United Kingdom |
Volume: | 54 |
Issue: | 1 |
Start Page Number: | 101 |
End Page Number: | 108 |
Publication Date: | Jan 2003 |
Journal: | Journal of the Operational Research Society |
Authors: | Lovell C.A.K., Rouse A.P.B. |
Keywords: | measurement |
DEA super-efficiency models were introduced originally with the objective of providing a tie-breaking procedure for ranking units rated as efficient in conventional DEA models. This objective has been expanded to include sensitivity analysis, outlier identification and inter-temporal analysis. However, not all units rated as efficient in conventional DEA models have feasible solutions in DEA super-efficiency models. We propose a new super-efficiency model that (a) generates the same super-efficiency scores as conventional super-efficiency models for all units having a feasible solution under the latter, and (b) generates a feasible solution for all units not having a feasible solution under the latter. Empirical examples are provided to compare the two super-efficiency models.