This paper tackles the issue of optimum product diversity in an impoerfeclty competitive market with small or large firms. First, it develops a quadratic utility model of monopolistic competition with horizontal product differentiation which avoids some of the main pitfalls of the S-D-S...

The advent of global airline alliances in the 1980s gave rise to concerns that increased monopoly power of major carriers would lead to large and sustained producer surpluses. These global alliances now enjoy dominant market shares in the industry. This review examines some 15 years of alliance...

During the last decade, Latin American countries have brought about important reforms in infrastructure services based both on private sector participation for enhancing internal efficiency and competition for increasing consumer welfare. Infrastructure services have evolved from monopoly and...

The purpose of this paper is to analyze the issues involved when introducing consumer choice into the power sector. Section 1 describes the approaches used by several countries to introduce tetail competition. Section 2 describes the forces that are pushing consumer choice and retail...

This note analyzes some properties of optional two-part pricing in a two-type economy. First, the optimal contracts along the Paretian frontier are described. Then, the duality relation between the Rawlsian program and the discriminating monopoly is demonstrated. Last, this property is used to...

Using a model where a monopoly chooses its commodity's quality as well as its quantity, we consider optimal regulation whenthe monopoly's costs are unknown to the regulator. Regarding quantity and quality, the results are a natural extension of Baron and Myerson (1982): the levels of quantity...