We show that the entry of a second firm in a horizontally differentiated market (ala Hotelling) may harm consumers as prices increase and consumer's surplus possibly decrease. We first derive the price and the consumer's surplus of a monopoly which is located at the center of the market. When a...

In this note, we use a two-stage game to examine the domination of uniform price by third-degree price discrimination in a -firm, two-market model. Not surprisingly, when , a monopoly case results. Accordingly, the price, output, profit, and welfare effects under third-degree price...

This paper tries to measure the welfare gains from technological innovation, focusing on the most important technological breakthough of Brazilian auto industry during the last decade: the so-called \ ex-fuel" cars, able to operate using various fuel types. In order to do that, initially a...

In the paper, I examine free entry in homogeneous product markets and its social efficiency. Previous research on free entry in homogeneous product markets has shown that under Cournot oligopoly with fixed setup costs the free entry equilibrium always delivers excessive entry. In contrast, I...

In June 2006, Russian federal law legalized the exclusive right of Gazprom to export natural gas to Europe, and thus thwarted efforts by the European Union to bring competition to the Russian gas industry. An understanding of the motivation of the Russian government to support this export...

We evaluate the social welfare loss (WL) that arises in an oligopolistic industry under technological competition and product differentiation. The main novelty of our approach concerns the decomposition of the WL into `dynamic' losses (from too little cost reduction and an inappropriate number...

We provide an extensive and general investigation of the effecst on industry performance - profits, social welfare and price-cost margins - of exogenously changing the number of firms in Cournot markets. This includes an in-depth exploration of the well-known trade-off between competition and...

Quantifications of gains from trade in heterogeneous firm models assume that productivity is Pareto distributed. Replacing this assumption with log-normal heterogeneity retains some useful Pareto features, while providing a substantially better fit to sales distributions-especially in the left...

In this note, we use a two-stage game to examine the domination of uniform price by third-degree price discrimination in a -firm, two-market model. Not surprisingly, when , a monopoly case results. Accordingly, the price, output, profit, and welfare effects under third-degree price...

This thesis consists of four self-contained papers related to the Nordic electricity market. Paper [I] examine how the reform of the Nordic electricity markets has affected competition in the electric power supply market, Nord Pool. The question is if the common power market has been competitive...