Policymakers and antitrust enforcers are debating whether to increase scrutiny of “nascent” acquisitions, in which an established company purchases a smaller firm in a related market, out of a concern that such acquisitions may stifle competition by nipping in the bud a potential rival....

An increasing body of empirical evidence is documenting trends toward rising concentration, profits, and markups in many industries around the world since the 1980s. Two major criticisms of these studies is that concentration and market shares are poorly measured at the national industry level...

The antitrust laws were not passed as an academic exercise. They were passed to break up the great Trusts, and to preserve competition. These were and are business issues. Our current debate over the impact of mergers on innovation seems to have left that business purpose and dimension out of...

Some legislators, especially on the far Left, have set their sights on making radical changes to federal antitrust law. They seek to weaponize antitrust law, such as by making it much easier for the federal government to wield antitrust power to reshape industries and the entire economy. This is...

There is a raging debate within antitrust to determine how to best assess the conduct of digital platforms and tailor the enforcement of antitrust laws to the modern economy. The distinguishing features of digital platforms can make their analysis quite different from conventional, single-sided...

The digitisation of existing business models and the new way of doing business of digital platforms pose new challenges both to the performance of companies in the market and to the lives of consumers and users. The dominant digital companies are all American (Google, Facebook, Amazon, and...

Anticompetitive conduct involved in purchasing labor services by a group of firms (or a single firm) sometimes may have the effect of benefiting downstream consumers even as the conduct harms the firms’ workers. Defendants may attempt to justify those restraints—and may argue the ancillary...

Demands for major antitrust reform are coming from all directions: politicians, industrial organization (IO) economists, and antitrust lawyers. While the political, legal, and economic debates vary in important ways, they all boil down to a single question: Do we need a “new” Sherman Act?...