| Article ID: | iaor19971676 |
| Country: | Netherlands |
| Volume: | 66 |
| Issue: | 1 |
| Start Page Number: | 103 |
| End Page Number: | 106 |
| Publication Date: | Aug 1996 |
| Journal: | Annals of Operations Research |
| Authors: | Thrall Robert M. |
It is shown that optimal dual solutions for the Additive and the BCC models are not invariant under translation. In particular, this implies that the Ali-Seiford and Pastor results on translations apply only to the envelopment portion of DEA and thus do not, in particular, deal fully with domains having nonnegative inputs and outputs (but with no zero input or output vector).