B2B electronic transaction platforms help business buyers and sellers find each other; help businesses manage procurement; and facilitate invoicing, payment and financing. A number of these platforms have emerged since the mid 1990s. Although the preponderance of transactions involve paper,...

Web-based businesses are increasingly the subject of antitrust concerns. Plaintiffs in the United States have sued eBay for tying its online payments service to its transaction service. Multiple jurisdictions in the European Community have claimed that Apple has violated the competition laws by...

This volume collects a series of essays that I have written over the last decade on multi-sided platform businesses that create value by providing products that enable two or more different types of customers to get together, find each other, and exchange value. Part I presents background pieces...

The web economy has grown rapidly in the last decade. Online businesses have several key features that are important for understanding the pro-competitive and anti-competitive strategies they may engage in. The two-sided markets literature helps elucidate many of these strategies. It also...

The subject of vertical restraints is well-trod territory in antitrust. Most of the cases, and economic literature, have focused, however, on the physical world of manufacturers and distributors. This paper considers what's new and different about the digital world that matters for the antitrust...

Tech Reg refers to the regulation of internet-connected digital businesses and the discipline that studies the when, and how, to do that. It covers areas as diverse as big tech, crypto, fintech, gig, misinformation, privacy, and telemedicine. It will expand over the coming decades as the digital...