Throughout the years, much intellectual energy has been invested into drawing the line between being anti-competitive by object or by effect, ignoring that an infringement must also be appreciable. Most likely based on a presumption that this is no longer a separate requirement, but part of...

Under EU competition law it is prohibited to conclude anti-competitive agreements. If found, such conduct warrants fines in the millions. How-ever, little guidance on what to consider restrictive practices are available from the relevant statute, referring the matter to case law. Here a pattern...

Are dominant online search engines monopolies enjoying low contest-ability, due to high barriers to entry, or innovative first-movers? This paper argues that dominant online search engines maintain their leadership through an “innovation feedback loop”: a process whereby increasing R&D...

Many online businesses, including most of the largest platforms, seek and provide attention. These online attention rivals provide products and features to obtain the attention of consumers and sell some of that attention, through other products and services, to merchants, developers and others...

This paper studies a two stage incomplete contract between a buyer and a seller, with specific investments and endogenous outside options. Given that a party's outside option identifies counterpart's competitors, with such endogenous outside options, some of the main conclusions of the standard...

In a companion note (Antitrust vs. Sector-specific Regulation in Telecom: What Works Best?), we argued that while the full liberalization of telecommunications markets provides scope for relying to a large extent on general antitrust rules and institutions as instruments of economic regulation,...