Various arguments attempting to resurrect the single monopoly profit theory of tying have been made, but none are successful. The Seabright claim that it is supported by a lack of empirical proof fails because the single monopoly profit theory is an impossibility theory, and my recommended...

Chicago School theorists have argued that tying cannot create anticompetitive effects because there is only a single monopoly profit. Some Harvard School theorists have argued that tying doctrine’s quasi-per se rule is misguided because tying cannot create anticompetitive effects without...