The purpose of this paper is to evaluate the market power of the Greek manufacturing and services industry over the period 1970-2007. In particular, the empirical model, estimates the mark-up ratio following the Roeger (1995) methodology, separately for the two industries by using Ordinary Least...

The impact of product variety on welfare has received little attention in the electronic commerce literature. The problem with product variety is that more variety does not necessarily imply higher welfare. This paper finds the conditions under which more variety, if caused by lower fixed costs,...

The newest findings in analysis of bilateral monopoly (BM) of lignite opencast mine & power plant have been discussed. The determinism of optimal solution not only in quantity of lignite (the size and shape of the ultimate pit) but also in its price has been depicted. It has been proposed to...

En el contexto de mercados imperfectos, las empresas pueden hacer uso dediferentes herramientas para competir estratégicamente con sus rivales. Tales el caso de los modelos clásicos de competencia de Cournot y Stackelbergen los que las empresas compiten eligiendo cantidades, o Bertrand en el...

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...

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 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...

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...

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...