The aim of this article is to evaluate, from an economic perspective, the efficiency of Web 2.0. It demonstrates that, because of the non-monetary nature of Web 2.0, several sources of inefficiencies (search costs, externalities, crowding out and adverse selection) exist. Nonetheless, the...

This article explains how DRM helped Apple gain market leadership, why Microsoft departed from its usual "software-only" strategy and dropped PlayForSure (and its partners) to launch Zune, why Sony, the historical market leader, failed where Apple succeeded while using the same strategy and,...