Ordoliberal doctrine and its recommendations on competition policy is an original German contribution to the development of economics and law. This theory has had an enormous impact on the development of German anti-trust legislation, and also contributed to the Treaties of Rome, including EU...

Indirect analysis of market power requires market delineation. Procedures in competition case law can be biased, as sample of market participants is typically biased or wrong one for analysis of market boundaries. Market delination can then be biased to too narrow markets, thus finding too much...

In competition law, the problem of the optimal design of institutional and procedural rules concerns assessment processes of the pro- and anticompetitiveness of business behaviors. This is well recognized in the discussion about the relative merits of different assessment principles such as the...

This paper provides a comparative analysis of methods for the empirical ex post evaluation of merger control decisions. It develops a competition-policy oriented framework of assessment criteria for the leading evaluation methods and applies them to structural modeling and simulation,...

Naturally, competition policy is based on competition economics made applicable in terms of law and its enforcement. Within the different branches of competition economics, modern industrial economics, or more precisely gametheoretic oligopoly theory, has become the dominating paradigm both in...

In this paper, we consider two platforms that compete for the development of a new product to integrate into their ecosystems. The new product can be developed either inhouse by the platforms or by an independent startup active only in the technology market. The presence of the startup affects...

Der vorliegende Beitrag wendet die dynamische Wettbewerbstheorie von Wolfgang Kerber und anderen auf aktuelle Fragen der Wettbewerbspolitik an. Damit zeigt der Beitrag, dass dynamische Wettbewerbstheorien sehr wohl zu konkreten wettbewerbspolitischen Empfehlungen führen und einen wichtigen...

Tracking online user behavior is essential for targeted advertising and is at the heart of the business model of major online platforms. We analyze tracker-specific web browsing data to show how the prediction quality of consumer profiles varies with data size and scope. We find decreasing...

The automotive industry is undergoing a fundamental transformation driven by digitization, enabling original equipment manufacturers (OEMs) to exert increasing control over vehicle functions, data, and - consequently - aftersales markets. Despite high relevance for consumers, regulatory scrutiny...

This essay discusses two immanent challenges for competition policy in online e-commerce markets: the platform character and the role of personalized data. Both phenomena are briefly described from an economic perspective (section 2 and 3) with a focus on how they affect and change competition...