| Article ID: | iaor19971675 |
| Country: | Netherlands |
| Volume: | 66 |
| Issue: | 1 |
| Start Page Number: | 93 |
| End Page Number: | 102 |
| Publication Date: | Aug 1996 |
| Journal: | Annals of Operations Research |
| Authors: | Pastor Jess T. |
This paper undertakes a revision and a generalization of the results contained in the only paper so far published on the matter of translation invariance by allowing inputs and outputs to take not only zero but negative values. This broadens the field of application of the DEA methodology.