| Article ID: | iaor2006294 | 
| Country: | Netherlands | 
| Volume: | 137 | 
| Issue: | 1 | 
| Start Page Number: | 91 | 
| End Page Number: | 100 | 
| Publication Date: | Jul 2005 | 
| Journal: | Annals of Operations Research | 
| Authors: | Puerto Justo, Garca-Jurado Ignacio, Fernndez Francisco Ramn, Fiestras-Janeiro Mara Gloria | 
In this paper we analyze how to improve the benefits of