Tying Arrangment: Quotation from Northern Pacific Railway Co. v. United States
For our purposes, a tying arrangement may be defined as an agreement by a party to sell one product, but only on the condition that the buyer also purchases a different (or tied) product, or at least agrees that he will not purchase that product from any other supplier. . . . They [tying arrangements] deny competitors free access to the market for the tied product not because the party imposing the tying requirements has a better product or a lower price, but because of his power or leverage in another market. At the same time, buyers are forced to forego their free choice between competing products. For these reasons, "tying agreements fare harshly under the laws forbidding restraints of trade." Times-Picayune Publishing Co. v. United States, 345 U. S. 594.