| Article ID: | iaor1988706 |
| Country: | Germany |
| Volume: | 33 |
| Start Page Number: | 167 |
| End Page Number: | 179 |
| Publication Date: | Jan 1989 |
| Journal: | Mathematical Methods of Operations Research (Heidelberg) |
| Authors: | Charnes A., Zlobec S. |
Efficiency evaluations in data envelopment analysis are shown to be stable for arbitrary perturbations in the convex hulls of input and output data. Also, the corresponding restricted Langrange multiplier functions are shown to be continuous. The results are proved using point-to-set mappings and a particular region of stability from input optimization.