See, for example, Kenneth J. Burchfiel, Patent Misuse And Antitrust Reform: "Blessed Be The Tie?", 4 Harv. J.L. & Tech. 1, 81 (1991) ("Moreover, as already pointed out, economists do not object if a buyer is 'forced' to buy a tied product, as long as it . . . is merely a counter to determine the intensity of use of the tying product, and the total supply of the tied product is not reduced for the buying public.")