"Multi-sided platform markets characterized by network externalities have always existed as an economic paradigm, but in different technological forms.1 The old village market place, physical shopping malls, or any traditional fair can be seen as multi-sided platform markets connecting buyers...

Competition policy debates on digital platform markets are often premised on the idea that market fragmentation and the standard forces of competition and entry may provide a potential solution to excessive concentration and market power. In this work, Francesco Ducci provides readers with a...