Consider a durable goods producer that potentially has market power in the aftermarkets associated with its own products. An important question is to what extent, if any, should the antitrust laws restrict the firm's behavior in these aftermarkets? In this paper we explore three models that...

Consider a durable goods producer that has the option of monopolizing an aftermarket such as repair for its own product. An important question is whether such monopolization reduces welfare? We show that the answer to this question is frequently no. In particular, we explore three models that...

This paper investigates the role of product upgrades and consumer switching costs in the tying of complementary products. Previous analyses of tying have found that a monopolist of one product cannot increase its profits and reduce social welfare by tying and monopolizing a complementary product...

Consider a durable goods producer that potentially has market power in the aftermarkets associated with its products. An important question is to what extent, if any, should the antitrust laws restrict the firm's behavior in these aftermarkets? In this paper we explore a number of models...

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...