Two software developers, each offering a product variety of different (exogenously given) quality, compete in prices for heterogeneous users who choose from purchasing a legal version, using an illegal copy, and not using a product at all. Using an illegal version violates intellectual property...

We study price discrimination in a monopolistic software market. The monopolist charges different prices for the upgrade version and for the full version. Consumers are heterogeneous in taste for infinitely durable software and there is no resale. We show that price discrimination leads to a...