The Economics of Platforms: A Theory Guide for Competition Policy

We propose an analysis of platform competition based on the academic literature with a view towards policy. First, we discuss to which extent can emerge in digital markets and show forms it take. In particular, underline role dynamics, but also differentiation, consumers multi-homing beliefs allow markets. Second, analyze policy issues how rules designed for standard perform two-sided that multi-sided externalities create new opportunities anti-competitive conducts, often related pricing contractual imperfections.