| Article ID: | iaor2007491 |
| Country: | Netherlands |
| Volume: | 170 |
| Issue: | 1 |
| Start Page Number: | 323 |
| End Page Number: | 325 |
| Publication Date: | Apr 2006 |
| Journal: | European Journal of Operational Research |
| Authors: | Jahanshahloo G.R., Foroughi A.A., Soleimani-damaneh M. |
In a recent paper by Chen, he deals with the infeasibility of super-efficiency DEA models in variable returns to scale (VRS) technology. He provides a necessary and sufficient condition for simultaneous infeasibility of input- and output-oriented super-efficiency DEA models in VRS case, then he claims that both of these models are infeasible only for a rare situation. In this paper, we present some counterexamples and comments to the contention by Chen.