Francesco Ducci is a Global Fellow at New York University, affiliated with the Centre for Law, Economics, and Organization. His research interests include competition policy, regulation, international trade, and law and economics.

'This is a powerful, erudite, and timely book that examines the problem of the digital platforms and how to control their power through every lens of competition and regulation, institutionally, legally, and economically. Offering perspectives through both the microscope and the telescope, it concludes that we must increase the complementarity between ex ante and ex post forms of interventions, with different tools and in different mixes as dictated by the platform and the market and how well competition can work.' Eleanor M. Fox, Walter J. Derenberg Professor of Trade Regulation, New York University School of Law

• 1. Introduction; 2. Technological change and natural monopolies in digital industries; 3. Horizontal search; 4. E-commerce marketplaces; 5. Ride-hailing platforms; 6. The institutional dimension of alternative policy options; 7. Conclusion; Bibliography.

Francesco Ducci is a Global Fellow at New York University, affiliated with the Centre for Law, Economics, and Organization. His research interests include competition policy, regulation, international trade, and law and economics.

'This is a powerful, erudite, and timely book that examines the problem of the digital platforms and how to control their power through every lens of competition and regulation, institutionally, legally, and economically. Offering perspectives through both the microscope and the telescope, it concludes that we must increase the complementarity between ex ante and ex post forms of interventions, with different tools and in different mixes as dictated by the platform and the market and how well competition can work.' Eleanor M. Fox, Walter J. Derenberg Professor of Trade Regulation, New York University School of Law

• 1. Introduction; 2. Technological change and natural monopolies in digital industries; 3. Horizontal search; 4. E-commerce marketplaces; 5. Ride-hailing platforms; 6. The institutional dimension of alternative policy options; 7. Conclusion; Bibliography.