According to European directives the German state deregulated several sectors which had been protected monopolies for a long time. A regulatory authority was established for the telecommunication sector with the competence to decide about the access conditions to the bottleneck "local loop". If...

In this study we analyze the determinants of airline price dispersion. We particularly concentrate on the conduct and marginal cost efficiency. The effect of conduct on price dispersion seems to depend on the characteristics of the market. For the big city routes, we observe positive effect; and...

We empirically test the hypothesis that the discounts offered by firms to consumers who purchase tickets in advance increase with the intensity of competition. We develop a new measure of competition for which we use the proximity (in departure time) of a given flight to its competitors to infer...