Digital platforms are increasingly the subject of regulatory scrutiny. In comparison to multiple competitors, a single platform may increase consumer welfare if network effects are large or may decrease welfare due to higher prices or reduction in platform variety. We study the net effect of...

We study an economy in which consumers and merchants (sellers) interact on a two-sided platform. Consumers can share data about their tastes for different varieties of a single good with the platform which in turn sells this data to merchants. Data sharing increases gains from trade by improving...

We analyze persuasion in a model in which each receiver can buy a direct access to the sender's signal or rely on her network connections to get it. For the sender, a higher bias increases the impact per direct receiver, yet diminishes the willingness of agents to receive information. Contrary...

We study the trade-offs faced by Internet Service Providers (ISPs) that serve as platforms through which consumers access both television and internet services. As online streaming video improves, these providers may respond by attempting to steer consumers away from streaming video toward their...

It is well known that two-sided network effects may turn duopolistic markets into monopolies, but it is still in question under which conditions this occurs in practice. To derive the conditions in which a platform market is tippy, I develop a differential game framework incorporating product...

We consider the merits of the recent EU’s Digital Markets Act from the perspective of innovation and value creation. We conceptualize innovation as new interactions being created by the digital platform leading to ‘value creation’, in contrast to facilitating existing interactions or...

In this paper, I study the competition of platforms which offer differentiated products à la Hotelling in the presence of network effects when the location choices are endogenous. I mainly find that undermill pricing policy and unbalanced competition, a tendency of agglomeration emerges in...

This paper studies asymmetric platforms' incentives for enforcing exclusivity on multihoming sellers. We show that exclusivity benefits a platform only when its service is not very valuable to sellers, and hence can be initiated by a weak platform rather than the stronger one. It is possible for...

This paper introduces a digital platform whose core building blocks are the direct imprinting of Information Technology into the Public Employment Services (PES) world. This platform is designed around a client-centered PES operational model, the main properties of which are investigated. The...