The identification of markets is a standard feature of anti-trust investigations, and the substantive decision in many cases stands or falls on the precise market definition selected.Market shares are often used to help establish jurisdiction or, more generally, to sort out priorities for...

In reviewing the theoretical and empirical literature on collusion, this paper distills methods for detecting cartels and distinguishing collusion from competition.

Die weltwirtschaftliche Verflechtung hat in der Nachkriegszeit stetig zugenommen. Da diese Entwicklung mit beträchtlichen Handelsgewinnen verbunden war, ist sie grundsätzlich positiv zu bewerten. Das Zusammenwachsen der Märkte erzeugt aber auch zusätzliche Spannungen, denn mit der...

Nicht zuletzt durch eine Reihe spektakulärer Unternehmenszusammenschlüsse ist die Frage nach den Ursachen, den Folgen und den Möglichkeiten bzw. Notwendigkeiten staatlicher Eingriffe im Rahmen der Wettbewerbspolitik erneut in das Zentrum der wirtschaftspolitischen Diskussion geraten....

Gaining access to technological assets and patents, in particular, has long been a major motive and objective for firm acquisitions. On the one hand, patents are used as a building instrument for the acquirer's technology portfolio. On the other hand, patents can be attractive because of their...

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...

Gaining access to technological assets and patents, in particular, has long been a major motive and objective for firm acquisitions. On the one hand, patents are used as a building instrument for the acquirer's technology portfolio. On the other hand, patents can be attractive because of their...

The paper develops a four-step framework to detect anticompetitive horizontal mergers. In the first step, an estimate of the impact of the merger on the market price needs to be derived. Subsequent, the second step of the framework has to assess whether such a predicted price increase would be...

Multimarket contact is perceived to be one of those factors, which can facilitate and sustain implicit collusive (cooperative) arrangements. This paper attempts to develop new approaches to study the interdependence of firm behaviour across markets, especially in the context of differentiated...

This paper aims to study geographical and multi-product linkages of markets (multiple market presence) and firm behaviour interdependence as a result of such linkages existence. In particular, it attempts to answer whether the multimarket linkages lead to more cooperative behaviour among the...