We analyze entry, pricing and product design in a model with differentiated products. Under plausible conditions, entry into an initially monopolized market leads to higher prices for some, possibly all, consumers. Entry can induce a misallocation of goods to consumers, segment the market in a...

We analyze entry, pricing, and product design in a model with differentiated products. Market equilibrium can be "separating," with multiple sellers and a sorting of heterogeneous consumers across goods, or "exclusionary," with one seller serving all customer types. Entry into an initially...

Standard economics provides a well-understood framework of the competitive determinants of market prices that is now widely accepted for antitrust analysis. In “two-sidedmarkets,” where firms supply products demanded by two interrelated groups of consumers, these competitive forces operate...

This paper examines the competitive actions taken by Microsoft in its "browser war" with Netscape, most importantly Microsoft's decisions to give away Explorer free of charge, integrate Explorer into its dominant Windows operating system and pay online service providers for exclusive...

Resale price maintenance need not be economically justified by the prevention of free-riding. Consistent with business realities, point-of-sale retailer promotional efforts often have a significant effect on consumer demand for a manufacturer’s products; and manufacturers often use resale...