Several European telecommunications regulatory agencies have recently introduced a fixed capacity charge (flat rate) to regulate access to the incumbents network. The purpose of this paper is to show that the optimal capacity charge and the optimal access-minute charge analysed by Armstrong,...

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...

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...