| Article ID: | iaor2006642 |
| Country: | China |
| Volume: | 22 |
| Issue: | 9 |
| Start Page Number: | 100 |
| End Page Number: | 103 |
| Publication Date: | Sep 2004 |
| Journal: | Systems Engineering |
| Authors: | Wu Wenjiang |
In this paper the existence of the optimal solution for an extensive C2GS2(C2R) DEA model is discussed, it is proved that the optimal value for extensive data envelopment analysis (DEA) model is equal to the optimal value for DEA model under some conditions, it is discussed that the DEA efficiency (C2GS2 or C2R) of a decision making unit is discriminated by the extensive DEA model, and it is proved that the threshold value of a decision making unit is equal to the optimal value of an extensive DEA model corresponding to it if all inputs and outputs are positive while this value exists.