mnli premise: Under the presumption that the postal monopoly applies in its clearest form only to the final delivery process, where scale economies are likely the greatest, the worksharing notion is that a discount should be offered to mailers or competitors1 who do portions of the postal work and then turn the mail over to the postal service for completion of delivery. hypothesis: Under the presumption that the postal monopoly applies only to the final delivery process, where scale economies are smallest, no discount should be offered to customers.