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 different perspective based on the theoretical lens of natural monopoly. Ducci explores this framework through the development of three case studies on horizontal search, e-commerce marketplaces, and ride-hailing platforms, investigating the strength and limit of potential (and often heterogeneous) sources of natural monopoly at play in each industry. Building on these case studies, the book then derives from the application of the natural monopoly framework general policy implications for digital industries by identifying the respective institutional flaws and shortcomings of ex ante and ex post approaches to market power as one of the central challenges in digital platform markets.

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 different perspective based on the theoretical lens of natural monopoly. Ducci explores this framework through the development of three case studies on horizontal search, e-commerce marketplaces, and ride-hailing platforms, investigating the strength and limit of potential (and often heterogeneous) sources of natural monopoly at play in each industry. Building on these case studies, the book then derives from the application of the natural monopoly framework general policy implications for digital industries by identifying the respective institutional flaws and shortcomings of ex ante and ex post approaches to market power as one of the central challenges in digital platform markets.

Controversy shrouds sharing economy platforms. It stems partially from the platforms' economic impact, which is felt most acutely in certain sectors: Uber drivers compete with taxi drivers; Airbnb hosts compete with hotels. Other consequences lie elsewhere: Uber is associated with a trend toward low-paying, precarious work, whereas Airbnb is accused of exacerbating real estate speculation and raising the cost of long-term rental housing. While governments in some jurisdictions have attempted to rein in the platforms, technology has enabled such companies to bypass conventional regulatory categories, generating accusations of "unfair competition" as well as debates about the merits of existing regulatory regimes. Indeed, the platforms blur a number of familiar distinctions, including personal versus commercial activity; infrastructure versus content; contractual autonomy versus hierarchical control. These ambiguities can stymie legal regimes that rely on these distinctions as organizing principles, including those relating to labour, competition, tax, insurance, information, the prohibition of discrimination, as well as specialized sectoral regulation. This book is organized around five themes: technologies of regulation; regulating technology; the sites of regulation (local to global); regulating markets; and regulating labour. Together, the chapters offer a rich variety of insights on the regulation of the sharing economy, both in terms of the traditional areas of law they bring to bear, and the theoretical perspectives that inform their analysis. Published in English.