| Article ID: | iaor19972119 | 
| Country: | Netherlands | 
| Volume: | 73 | 
| Issue: | 3 | 
| Start Page Number: | 510 | 
| End Page Number: | 516 | 
| Publication Date: | Mar 1994 | 
| Journal: | European Journal of Operational Research | 
| Authors: | Story Sverre | 
The present paper studies how the weights used in column aggregation of linear programs may be changed in order to improve the objective value. A procedure similar to postoptimal change of the coefficients of a basic variable is developed.