We analyze competition between vertically integrated infrastructure operators that provide access in different geographical areas. A regulator may impose a uniform access price, set local access rates, or deregulate access locally. We analyze the impact of these alternative regulatory regimes on...

We propose a two-sided model with two competing Internet platforms, and a continuum of Content Providers (CPs). We study the effect of a net neutrality regulation on capacity investments in the market for Internet access, and on innovation in the market for content. Under the alternative...

We develop a model of strategic geoblocking, where two competing multi-channel retailers, located in different countries, can decide to block access to their online store from foreign consumers. We characterize the equilibrium when firms decide unilaterally whether to introduce geoblocking...

Platform interoperability is considered a powerful tool to promote competition in digital markets when network effects are at play. We study the effect of interoperability on competition between two ad-financed platforms, allowing for endogenous multi-homing of consumers. When the platforms are...

In this paper, we evaluate the efficiency of the French State aid plan for broadband deployment, the Plan France Très Haut Débit. According to State aid rules, public subsidies should not be substitute for private investment and should target areas with market failures. We estimate a...

In this paper, we first provide a simple framework for cooperation in product development between competitors. We put forward the trade-off between the benefits obtained through development cost-sharing and the cost of intensified competition due to reduced product differentiation, which implies...

In this paper, we consider an unregulated incumbent who owns a broadband infrastructure and decides on how much access to provide to a potential entrant. The level of access, i.e., the network elements that are shared in the provision of competing broadband services, not only determines the...

This paper studies the incentives of a merchant to bypass a payment platform by issuing private cards. In our model, a payment platform allocates the total cost of a card transaction between a monopolistic issuer and a monopolistic acquirer by choosing an "interchange fee". We determine how the...

This paper deals with the question of the security of the payments on Internet and proposes a formal framework to study its impact on the development of the electronic commerce. We show, within the framework of a competitive supply of the security of the payments, that a weak development of the...

In this paper, we study the development of mobile payments as an innovation in developed countries. In particular, we introduce five cooperation models that have emerged or could emerge between banks, mobile network operators, and payment systems, for the development of this new payment method....