This paper investigates how the tying of complementary products can be used to both preserve and extend monopoly positions. We first show how a firm that is a monopolist of a product in the current period can use tying to preserve its monopoly position in future periods. We then show using...

Markets for durable goods constitute an important part of the economy. In this paper I first briefly review the microeconomic theory literature on durable-goods markets, focusing mostly on the last ten years. I then discuss a number of my own recent analyses concerning optimal antitrust policy...

In response to the "standardless" approach used in LePage's v. 3M, the Antitrust Modernization Commission (AMC) and others advocate using a discount allocation approach to assess whether bundled loyalty discounts violate Section 2 of the Sherman Act. This approach treats loyalty discounts like...

Durable-goods producers frequently choose to monopolize the maintenance markets for their own products. This paper shows that, similar to leasing, one reason a firm may employ this practice is that it reduces or even eliminates problems due to time inconsistency. We first demonstrate this result...

This paper investigates the relationship between the way rational expectations is employed in practice and the argument initially put forth to justify its use. In practice, rational expectations has meant that the expectations of each agent taken separately is consistent with the predictions of...