| Article ID: | iaor19981994 |
| Country: | United Kingdom |
| Volume: | 48 |
| Issue: | 4 |
| Start Page Number: | 446 |
| End Page Number: | 448 |
| Publication Date: | Apr 1997 |
| Journal: | Journal of the Operational Research Society |
| Authors: | Cook W., Green R.H., Doyle J. |
This paper considers the objective function of the Additive (Pareto-Koopmans) Data Envelopment Analysis model and finds a flaw which is induced by the manner in which units invariance is sought. This flaw is rectified, in the spirit of the original proposal, but the consequence is a non-linear objective function for the efficiency calculations. However, the resulting non-linear programming problems solve readily with existing NLP software.