The liberalisation of air transport that took place in the European Union at the beginning of the nineties has involved positive effects on the welfare traveller. However, there is an agreement in the academic literature that such effects depend on the existence of an effective competition at...

Using data on 172 city-pair markets in eight European countries, we investigate the effect of the market structure on airlines choices of frequency and prices. Applying an address model, we show that equilibrium prices depend on passengers value of time, marginal flight costs and the aggregate...

This paper estimates a model of airline competition for the Spanish air transport market. I test the explanatory power of alternative oligopoly models with capacity constraints. In addition, I analyse the degree of density economies. Results show that Spanish airlines conduct follows a...

I ringa utsträckning diskuteras graden av konkurrens. En förklaring kan vara, att konkurrensuppfattningen härrör från neoklassisk teori. En mera realistisk konkurrensuppfattning vinns genom att utgå från SCP-paradigmet. Med hjälp av detta paradigm kan urskiljas tre grupper av begrepp,...

Many countries that produce rough diamond have experienced a highly adverse pattern of economic development. In this article, we propose that the primary reason for the negative impact is that diamonds easily become the prize in predatory struggles between loot-seeking rebels and more or less...

System reliability is a key aspect of electricity supply, and the ability to maintain system reliability thus is an important aspect of a liberalised electricity market. But system reliability can be ensured only if there is sufficient reserve capacity at all times. In a liberalised electricity...

In a non-cooperative oligopoly model where firms use simple linear prices, Klemperer (1987) has shown that the existence of consumers’ switching costs may generate monopoly like prices, and thereby create substantial loss in welfare. We show that when allowing firms to use two-part tariffs,...

The general opinion among power industry representatives and electricity market analysts is that the Nordic electricity market has worked well. The purpose of this paper is to explore why the Nordic electricity market has performed well and to consider to what extent the Nordic experiences are...

We analyze the success of filtering as a solution to the spam problem when used alone or concurrently with sender and/or receiver pricing. We find that filters alone may exacerbate the spam problem if the spammer attempts to evade them by sending multiple variants of the message to each...

Mankiw Romer and Weil (1992) made the Solovian set up widely-used to test the determinants of economic growth and the speed of convergence. Subsequently, in almost all convergence studies, an exogenously growing technology is assumed and this component is treated as part of the constant term. In...