In this paper, we consider a duopoly model where two firms sell two differentiated products and there is a network externality between either carriers or machines. We derive the equilibria of these games and illustrate the effects of a change in quality on the equilibrium quantity of each good....

This paper develops a model of an export oligopoly to examine the welfare effects of an export tax reduction and a production tax increase that makes the foreign country no-worse off. Whether or not entry into the oligopolistic industry is free, the proposed policy reform is shown to reduce...

We consider cannibalization in a duopoly model in which firms with diffrent costs supply two vertically differentiated products in the same market. We find that an increase in the difference in quality between the two goods or a decrease in the marginal cost of the high-quality goods leads to...

In this paper, we consider and propose a new duopoly model of cannibalization in which firms produce and sell two vertically differentiated products in the same market. We show that each firm produces the high-quality good more (less) than the low-quality good if the upper limit of taste of...

In a real oligopoly, firms often supply multiple products differentiated by quality in the same market. To examine why they do so, we consider a duopoly model in which firms can choose between supplying two vertically differentiated products and selling a single product in the same market. By...

Constructing a model of oligopoly with free entry, this paper examines the effects of a tariff reduction accompanied with a unit of consumption tax increase on welfare, government revenue, and market access. We show that the suggested policy reform reduces welfare while enhancing government...

This paper develops a model of an export oligopoly to examine the welfare effects of an export tax reduction and a production tax increase that makes the foreign country no-worse off. Whether or not entry into the oligopolistic industry is free, the proposed policy reform is shown to reduce...