"Mobile Virtual Network Operators: Beyond the Hyperbolae", 2007, Competition Policy International 3(1), with Pedro Pereira (Autoridade da Concorrência).

In this paper, we discuss briefly, and in non-technical terms, some aspects related to the entry of MVNOs. These aspects range from issues related to the entry process itself, such as barriers to entry and exclusionary practices, to the effects of entry on prices and product differentiation.