The Impact of Economic Analysis on Market Definition in the Context of Digital Platforms

While advances in economic theory, econometrics and data availability have helped antitrust authorities to fine-tune their approach to market definition in traditional brick and mortar markets, new economic insights have upended the applicability of the very same market definition tools in (digital) platform markets. We briefly discuss five complications laid bare by developments in the economics of digital platform markets: zero-price markets, personalized pricing, the single versus multi marke