This paper studies competition in the German market for mobile telecommunications, motivated by recent suggestions that T-Mobile and Vodafone possess a position of collective dominance. Allegedly, their position of joint dominance is secured through a combination of first-mover advantages and...

Seit einigen Jahren wird in Europa ein neuer Regulierungsansatz im Telekommunikationssektor diskutiert: weg von einer nationalen Betrachtungsweise hin zu einem subnationalen Ansatz, bei dem Gebiete mit ausgeprägtem Wettbewerb dereguliert werden. In den Diskussionen wurden zahlreiche Argumente...

Competition between parallel infrastructures incorporates opposing welfare effects. The gain from reduced deadweight loss might be out- weighed by the inefficient duplication of an existing infrastructure. Using data from broadband internet access for Western Europe 2000-2004, this paper...

This paper analyzes how competition works in mobile telecommuncations markets and, bases on this analysis, we discuss whether regulatory intervention in mobile telephone markets is justified from an economic perspective. Starting point of our analysis is the observation that an evaluation of...

This paper examines the consequences of introducing mobile number portability (MNP). As MNP allows consumers to keep their telephone number when switching providers, it reduces consumers' switching costs. However, MNP may also cause consumer ignorance if telephone numbers no longer identify...

Die Alternative 'Ex-Ante-Regulierung versus Ex-Post-Aufsicht' ist der Kern der ordnungspolitischen Kontroversen der letzten Jahre im Bereich der Netzindustrien - insbesondere in der Telekommunikation und der Energiewirtschaft. Die grundlegenden Reformen des ordnungspolitischen Rahmens haben in...

This paper gives a survey of the current state of competition in the German Broadband access market. Existing regulations and their impact on the deployment of high-speed Internet access are evaluated. It is argued that facilities-based competition is preferable to open-network regulations. The...

Abstract In markets with competing interconnected networks like mobile telecommunication markets investments affect the investor’s and also any competitors’ profits. In a theoretical model it is shown that cost-reducing investments reduce the investor’s termination rates and increase...

This paper studies competition in the German market for mobile telecommunications, motivated by recent suggestions that T-Mobile and Vodafone possess a position of collective dominance. Allegedly, their position of joint dominance is secured through a combination of first-mover advantages and...

The interplay of infrastructure supply and demand is of central interest in line with Web 2.0. As the role of customers turns from a service users' role to an information providers' role, the traffic on existing lines increases and, simultaneously, customers' demand for high-quality...