We characterize collusion involving secret vertical contracts between retailers and their supplier – who are all equally patient ("vertical collusion"). We show such collusion is easier to sustain than collusion among retailers. Furthermore, vertical collusion can solve the supplier's...

We consider infinitely repeated vertical relations when a retailer can sell an established product and a new product that is initially inferior but can improve over time. We find that the retailer has an incentive to sell the new product more than what maximizes industry profits. The...

We characterize the features of collusion involving retailers and their supplier, who engage in secret vertical contracts and all equally care about future profits (“vertical collusion”). We show such collusion is easier to sustain than collusion among retailers. The supplier pays retailers...

This paper asks whether a privately informed retailer may have an incentive to share its marketing data with the manufacturer, in a way that would enable the manufacturer to gain ex-post, but non-contractible information. I consider an infinitely repeated dynamic vertical relations with adverse...

We consider vertical restraints in the context of an intrabrand competition model in which a single manufacturer deals with two vertically differentiated retailers. We establish two main results. First, if the market cannot be vertically segmented and the cost difference between the two...

The paper considers an infinitely repeated competition between vertical manufacturer-retailer hierarchies. In every period, retailers privately observe the demand, consequently manufacturers pay retailers “information rents”. I compare between several collusive equilibria that differ in the...

When competition authorities struggle to assess abusive practices by online multi-sided platforms, the issue does not appear to be defining markets or determining market power; rather, the difficulty is finding a fitting theory of abuse. In the search for such theories, one candidate has been...

The platform economy is subject to increasingly intense competition law enforcement. One part of the platform economy — the peer-to-peer (P2P) economy — has so far largely evaded scrutiny by competition law authorities. As this contribution shows, this is not necessarily because of a...

It is often argued that most favoured nation clauses (‘MFNs’) should be assessed on a case-by-case basis given the perceived lack of a coherent theory guiding their assessment. This article asks whether this is the case: do we lack an assessment framework of MFNs under EU competition law? In...

While online platforms are an enforcement priority for European competition authorities, the latter are only now turning their attention to app stores (after having scrutinized, among others, hotel booking websites, search engines and online marketplaces). However, app stores can be...