| Article ID: | iaor20123236 |
| Volume: | 220 |
| Issue: | 2 |
| Start Page Number: | 588 |
| End Page Number: | 590 |
| Publication Date: | Jul 2012 |
| Journal: | European Journal of Operational Research |
| Authors: | Fang Lei, Li Hecheng |
| Keywords: | statistics: data envelopment analysis |
In a recent paper by Mostafaee and Saljooghi (2010), the authors extend the classical cost efficiency model to address data uncertainty. They claim that the upper bound of the cost efficiency can be obtained at extreme points when the input prices appear in the form of ranges. In this paper, we present our counterexamples and comments on the contention by Mostafaee and Saljooghi.