Digitale Großkonzerne wie Facebook, Google & Co. stellen die Wettbewerbsinstitutionen vor neue Herausforderungen. Mithilfe der Charakteristiken von Plattformmärkten können sie ihre Macht und Verhandlungsstärke zunehmend verfestigen und darüber hinaus marktübergreifende digitale Ökosysteme...

In this paper, we analyse the final decisions for merger cases prepared by the European Commission (EC) since 1990 and build a unique subsample for all non-cleared cases. These incorporate all merger notifications which were either withdrawn by the notifying parties or have been prohibited by...

A central motivating factor for studying price markups is their effect on consumer welfare. Reported estimates of (firm-level) price markups in the literature, however, are often focused on industry or cross-country comparisons. These treat different industries equally rather than based on how...

Dieser Beitrag fasst die ökonomischen Besonderheiten von Unterhaltungsmärkten zusammen und legt dabei einen besonderen Fokus auf Digitalisierungseffekte. Dabei werden die Aspekte Erfahrungsgüter und Qualität, Fixkostendegression & Güterheterogenität, Super-stareffekte, die Rolle...

The paper analyses the economics behind algorithmic search and recommender services, based upon personalized user data. Such services play a paramount role for online services such as marketplaces (e.g. Amazon), audio streaming (e.g. Spotify), video streaming (e.g. Netflix, YouTube), app stores,...

To encourage private actions for damages in antitrust cases some jurisdictions subtract a fraction of the redress from the fine. We analyze the effectiveness of this policy. Such a rebate does not encourage settlement negotiations that would otherwise not occur. If, however, the parties settle...

We identify features of interactions on online platforms that make an ad-funded business model attractive for the platform, but also for consumers. We then show that ad-funded platforms heavily rely on data for their ability to create value for their users. Formally, we show that data...

We study the question whether a holder of standard essential patents (SEPs) should be allowed to choose the level in the value chain at which to offer a FRAND license to its SEPs. We give a pos-itive answer to this question for two reasons. First, the SEP holder and the social planner tend to...

Japanese antitrust law exempts a variety of vertical and horizontal restraints that are commonly regarded as anti-competitive. Measures of market structure, market power and deadweight loss in the United States and Japan, however, indicate a striking similarity in the level of "competition" in...

How do incentives to collude depend on how asymmetric firms are? In many markets product quality is an important parameter that determines firms' market strategies. We study collusion in a quality-differentiated duopoly and we adopt a Nash bargaining approach to compute the collusive equilibrium...