This paper analyzes competition between firms who sell multiple products in the presence of negative externalities. The model involves two networks who each may offer several service classes. Service classes are generated by forming sub-networks differentiated by their congestion levels. The...

A model of interaction between hardware vendors, Intel and AMD, and developers of Windows and Linux operating systems is suggested. Intel and AMD both maximize profits forming a traditional oligopoly, while Microsoft and the community of Linux developers form a mixed duopoly, in which only the...

While competition between firms producing substitutes is well understood, less is known about rivalry between complementors. We study the interaction between firms in markets with one-way essential complements. One good is essential to the use of the other but not vice versa, as arises with an...

The present paper is concerned with providing a core model to address the issue of firms simultaneously competing in both prices and quantities (capacity levels) within a simple duopoly market setting where products are asymmetrically differentiated by endogenous quality location. A three-stage...

We consider the issue of first- and second-mover advantages in a vertically related market. First, we show that the standard conclusions about sequential-move games under Bertrand and Cournot competitions can change in the context of a vertically related market. This is because an upstream...

Alliances between competitors where an established firm provides access to its marketing and distribution channels are an important real-world phenomenon. We analyze a market where an established firm, firm A, produces a product of well-known quality, and a firm with an unknown brand, firm B,...

This paper considers the collusive stability of downstream competition in a vertical market with network externalities and cost asymmetry. A dynamic collusion game is constructed, and backward induction is employed to solve the subgame perfect Nash equilibrium. We show that larger network...

This paper provides a structural interpretation to the estimates of the shape and position of nonlinear tariffs. We focus on the evaluation of price-cost margins, and thus we need to identify marginal cost from an equilibrium model of nonlinear pricing competition. We estimate these price-cost...

We revisit the relationships between competition and various market outcomes in a differentiated Cournot oligopoly. Consider an oligopolistic market with two differentiated varieties, where each firm sells one of the varieties. We show that social welfare and consumer surplus can decrease with...

We revisit the relationships between competition and market outcomes in a Stackelberg oligopoly. Consider a differentiated oligopolistic market consisting of n leaders with different efficiencies and m followers. We show that the efficient leader's profit may increase with the number of...