Premise: It has been pointed out by the American co-authors of this paper that a post could rationalize its delivery costs by reducing the frequency of service on unprofitable routes to the point where they become profitable (Cohen et al.

Hypothesis: It was pointed out by the co-authors that the post could rationalize the delivery costs by lowering the frequency of service on bad routes until they finally stopped losing $100,000 a year on them.
Relation: neutral