This paper investigates how the tying of complementary products can be used to 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 … monopoly position into a newly emerging market. The analysis focuses on the importance of entry costs and network externalities …

Previous work has claimed that monopoly power facilitates the provision of credit, since monopolists are better able to … creditworthiness, monopoly power may reduce credit provision because hold up problems ex post will deter borrowers from investing in … establishing creditworthiness. Empirically, we examine the relationship between monopoly power and credit provision, using data on …

, suffer a loss, that is not offset by gains to the monopolist. This is the "deadweight loss" from monopoly, and in … conventional analysis the only social cost of monopoly. The loss suffered by those who continue to buy the product at the higher … cost is regarded merely as a transfer from consumers to owners of the monopoly seller and has not previously been factored …

absolute margin. We derive these results in both a monopoly model and a variety of different competitive models. We conclude …

include pre-existing monopoly power as well. We show that the existence of monopoly power has two offsetting effects on … welfare. First, the environmental policy reduces monopoly profits, and the negative effect on income increases labor supply in … interaction with the pre-existing monopoly distortion further exacerbates the labor supply distortion. This second effect is …