| Article ID: | iaor20031615 |
| Country: | Netherlands |
| Volume: | 30 |
| Issue: | 5 |
| Start Page Number: | 333 |
| End Page Number: | 335 |
| Publication Date: | Oct 2002 |
| Journal: | Operations Research Letters |
| Authors: | Ye Yinyu, Zhang Jiawei |
| Keywords: | location |
We show that the maximization version of the multi-level facility location problem can be approximated by a factor of 0.5. The only previously known result is a factor of 0.47 for the two-level case obtained recently by Bumb.