Hailu A and TS Veeman (2001). “Non-Parametric Productivity Analysis with Undesirable Outputs: An Application to the Canadian Pulp and Paper Industry.” American J Agricultural Economics 83(3): 605-616.
Hailu A and TS Veeman (2001). “Non-Parametric Productivity Analysis with Undesirable Outputs: An Application to the Canadian Pulp and Paper Industry.” American J Agricultural Economics 83(3): 605-616.