"The conditions under which a durable good supplier employs a tying arrangement that binds aftermarket purchases to the original sale was a central issue in the Kodak case. Two competing theories were presented in that case. Importantly, neither of these provides an efficiency-based explanation...

This article provides a novel graphical exposition of the economic theory of regulation. In particular, we show--within a single graphical construct--a number of features that emerge from the theory. Through a variety of applications we are able to provide an improved understanding of many...