Partial ownership of stock in multiple competing firms is an important scholarly and policy topic in both corporate and antitrust law. Until now, the discussion has focused on ownership. This essay shifts the debate from a focus on common ownership to a focus on common control. No prior work has...

While price-fixing on platforms can attract severe enforcement action, as shown by the Amazon poster case, a more nuanced picture emerges regarding the fixing of prices for sellers by sharing economy platforms. This paper explores possible antitrust responses to such centralised platform-driven...

We study how the most-favored-nation (MFN) clause affects the tariffs of an importer, the technology choices of exporters, and global welfare. Our key contribution is to consider that the MFN clause does not only impose nondiscriminatory tariffs but also makes tariffs observable to third...

Growing numbers of legislators and policy experts charge that tech firms such as Amazon, Google, Facebook, Apple, and Microsoft are “monopolies,” with the potential power to harm consumers.Many economists, lawyers, and politicians say that economic features of these companies' product...

When an upstream monopolist supplies several competing downstreamfirms, it may fail to monopolize the market because it is unable to commit not to behave opportunistically. We build on previous experimental studies of this well-known commitment problem by introducing communication. Allowing the...

Building on the seminal paper of Ordover, Saloner and Salop (1990), I study the role of reputation building on foreclosure in laboratory experiments. In one-shot interactions, upstream firms can choose to build a reputation by revealing their price history to the current upstream competitor. In...

This paper (only available in Spanish) summarises the relevant literature in the field of vertical restraints in connection with retail markets and distribution, and provides some insights from Chilean practice