This article examines the economic consequences of collusion in both the output market and one of the input markets. We examine the results of sequential collusion, which leads to complications and inconsistencies in measuring antitrust damages. We also examine simultaneous collusion in both the...

The ministerial proposal for a 10th amendment of the German competition law particularly addresses abuse control and seeks to tighten this pillar of competition policy against the background of the challenges from the digital economy. Next to extending the classic policy instruments of abuse...

This is a survey of the economic principles that underlie antitrust law and how those principles relate to competition policy. We address four core subject areas: market power, collusion, mergers between competitors, and monopolization. In each area, we select the most relevant portions of...

Dominant or apparently dominant internet platform increasingly become subject to both antitrust investigations and further-reaching political calls for regulation. While Google is currently in the focus of the discussion, the next candidate is already on the horizon - the ubiquitous online...

While private actions for damages by customers against price-cartels receive much attention, the treatment of other groups affected by such conspiracies is largely unresolved. This article narrows the research gap with respect to suppliers to a downstream price cartel. First, we show that such...

While private actions for damages against price-cartels by direct and indirect customers receive much attention, it is largely unresolved to what extent other groups that are negatively affected may claim compensation. This paper focuses on probably the most important one: suppliers to a...

This paper reviews the legal and economic structure of the class action litigation model in the United States, as set forth by rule 23 of US civil procedure, exploring the requirements for obtaining class certification and maintaining a class action. I analyze a number of critical issues and...

While private actions for damages by customers against price-cartels receive much attention, the treatment of other groups affected by such conspiracies is largely unresolved. This article narrows the research gap with respect to suppliers to a downstream price cartel. First, we show that such...

The latest frontier of the essential facility doctrine under EU competition law is the use of antitrust rules to impose on dominant firms a duty to invest in infrastructure development. While a genuine lack of capacity has traditionally been considered an objective justification for a refusal to...