Federal Trade Commission v. Cement Institute…
“ This is the field where a producer, for his own purposes and without collusion, often ships his product to a customer who, in terms of freight charges, is located nearer to one or more of the producer's competitors than to the producer himself. In selling to such a customer, this producer is at an obvious freight disadvantage. To meet the lower delivered-price of his competitor, the producer, therefore, reduces his delivered-price in that area by a sum sufficient to absorb his freight disadvantage. ”
