Under ex ante access regulation entrants often claim that access fees are excessive. I show that this is only the case if further entry is admitted. If the entrant is protected from further entry it would agree with the incumbent upon a strictly positive access fee which may exceed the efficient...

The main goal of this paper is to provide an analysis of key regulatory changes in the European merger control and to evaluate their real impact on the efficiency of merger regulation. Our main contribution is an empirical analysis of a unique representative sample of 161 horizontal mergers...

The paper discusses the respective roles of competition policy and sector-specific regulation for industries such as telecommunications, electricity, and gas, in which network infrastructures that are natural monopolies serve as essential facilities for anybody who wants to provide services in...

Suchmaschinen ermöglichen Nutzern einen schnellen Zugang zu Informationen, die sie konkret suchen oder die sie durch die Suchmaschine entdecken. Sie haben sich zu wichtigen Informationsintermediären entwickelt. Aufgrund ihrer zentralen Rolle in der Informationsvermittlung und der...

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...

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...

The existence and the use of the essential facilities doctrine was questioned in theory and in practice. Although the doctrine was developed in antitrust, it became a frequently cited notion in the regulation of network utilities. Its relevance is hotly debated during the setup of the new...

The paper discusses the respective roles of competition policy and sector-specific regulation for industries such as telecommunications, electricity, and gas, in which network infrastructures that are natural monopolies serve as essential facilities for anybody who wants to provide services in...

The existence and the use of the essential facilities doctrine was questioned in theory and in practice. Although the doctrine was developed in antitrust, it became a frequently cited notion in the regulation of network utilities. Its relevance is hotly debated during the setup of the new...

The main goal of this paper is to provide an analysis of key regulatory changes in the European merger control and to evaluate their real impact on the efficiency of merger regulation. Our main contribution is an empirical analysis of a unique representative sample of 161 horizontal mergers...