This paper discusses the general characteristics of online markets from a competition theory perspective and the implications for competition policy. Three important Internet markets are analyzed in more detail: search engines, online auction platforms, and social networks. Given the high level...

Der vorliegende Beitrag befasst sich mit aktuellen Wettbewerbsproblemen im deutschen Lebensmitteleinzelhandel. Im Mittelpunkt der Analyse stehen der zunehmende Konzentrationsprozess und seine Determinanten. Darauf aufbauend diskutieren wir Aspekte der Marktabgrenzung insbesondere im Hinblick auf...

This paper summarizes the peculiarities of online markets and discusses recent antitrust cases related to online markets. Following a brief description of the online markets' characteristics and potential tendencies for concentration the paper first discusses the antitrust allegations and...

Das Internet ist stark durch Wettbewerb zwischen Plattformen geprägt, welche potenzielle Tauschpartner zusammenbringen. Die Konkurrenz zwischen solchen mehrseitigen Plattformen und die Marktkonzentration wird maßgeblich bestimmt durch (1) die Stärke der indirekten Netzeffekte, (2) das Ausmaß...

Traditional economic theory of collusion assumed that cartels are inherently unstable, and yet some manage to operate for years or even decades. While the literature has presented several determinants of cartel stability, the vast majority focuses on firms as entities, even though cartels are...

Traditional economic theory of collusion assumed that cartels are inherently unstable, and yet some manage to operate for years or even decades. While the literature has presented several determinants of cartel stability, the vast majority focuses on firms as entities, even though cartels are...