Mihir Kshirsagar argues that the evidence presented in FTC v. Meta shows that discussions about the application of First Amendment protections to social media must go beyond the binary set in Moody v. NetChoice between treating them as common carriers or editorial agents. Rather, a commercial conduct framework is needed to understand how speech operates on platforms designed to maximize user attention and ad revenue.

COMMENTARY

The Trends That Will Define European Antitrust in 2026

Four experts predict some of the trends that will define European competition in 2026.

RESEARCH

GenAI is Already Boosting Scientific Output. We Should Embrace It

In new research, Dragan Filimonovic, Christian Rutzer, and Conny Wunsch find that generative artificial intelligence not only enhances the productivity of scientific researchers, but also lowers barriers to entry for early-career scholars and scholars who are not fluent in English. Rather than attempting to prohibit GenAI’s use, institutions should develop disclosure guidelines to facilitate trust and support adoption.
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The Trends That Will Define US Antitrust in 2026

Four experts predict the trends that will define United States antitrust and competition in 2026.

The Trends That Defined US Antitrust in 2025

Four experts reflect on some of the trends that defined United States antitrust and competition in 2025.

The Trends That Defined European Antitrust in 2025

Four experts reflect on some of the trends that defined European competition in 2025.

What Principles Influence Public Support for Stronger Antitrust Enforcement?

In two new research papers, Ryan Brutger and Amy Pond explore how different messaging about the effects of  antitrust enforcement sway American public opinion toward and away from stronger enforcement.

How To Secure an Epic Win for Consumer Choice on Android Phones

For the first time in the history of mobile phones, Americans will be able to access a variety of app stores on Android phones, following game developer Epic Games’ legal victory over Google. Fiona Scott Morton and Nick Jacobson discuss how Google may try to undermine the court’s remedies to stifle competition and how both American and European regulators can respond to protect competition.

READING LISTS

Americans spend significantly more on health care than any other country. Why? Answers to this question range from hospital monopolies to perverse incentives to opaque pricing to medical licensing to pharmaceutical firms abusing IP practices to “creeping consolidation.” Why is the US health care system so broken? And what can antirust do about it? Catch-up on our coverage of antitrust and the US health care system.

Novo Nordisk’s Offer To Acquire Metsera Constitutes Attempted Monopolization

Hannah Pittock uses weight-loss company Novo Nordisk’s offer to acquire Metsera to create a three-prong framework by which the antitrust agencies can identify when an invitation to exclude a rival from a market constitutes illegal exclusionary conduct under Section 2 of the Sherman Act.

Novo Nordisk’s Killer Non-Acquisition Merger Contract Proposal Is a Case of “Heads I Win, Tails You Lose”

Steve Salop explores the anticompetitive innovation behind weight-loss giant Novo Nordisk’s offer to acquire Metsera. Novo’s proposed contract presents a new tactic by which firms with market power can preclude rival mergers that will lead to procompetitive entry.

Will Trump’s Drug-Pricing Order Reduce Prices for Americans?

President Donald Trump has, across two administrations, sought to lower drug prices for Americans, most recently with executive order “Delivering Most-Favored-Nation Prescription Drug Pricing to American Patients.” Margherita Colangelo explains why his order is unlikely to accomplish its goal.

Is Competition Law Making Us Sick?

In new research, Benjamin Wood, Sven Gallasch, Nicholas Shaxson, Katherine Sievert, and Gary Sacks write that competition underenforcement and a narrow regulatory focus on prices and output has allowed industries that produce harmful consumer products, such as tobacco or ultra-processed foods, to increase demand and, consequentially, harm to society. They argue that competition law must evolve to consider health impacts.

George J. Stigler, one of the most influential economists of the 20th century, won the Nobel Prize in Economic Sciences in 1982 “for his seminal studies of industrial structures, functioning of markets, and causes and effects of public regulation.” His research upended the idea that government regulation was effective at correcting private-market failures. Stigler introduced the idea of regulatory capture, in which regulators could be dominated by special interests. These regulators would work for the benefit of large, monied organizations rather than the public good. Catch up on ProMarket's coverage of his legacy.

Antitrust’s Hydraulic Effects on Startups

In recent research, Brian Broughman, Matthew Wansley, and Samuel Weinstein examine how startups are changing their traditional exit strategies in response to more stringent antitrust enforcement. Many startups are adopting alternative strategies to stay private longer, ultimately raising new questions for competition policy. 

How Regulation Can Target the Negative Effects of Vertical Foreclosure

In a new NBER working paper, Charles Hodgson and Shilong Sun show that vertical integration is usually good for consumers, except when firms have both the ability and the incentive to foreclose rivals.  They use the heavily integrated Chinese Film Industry to show that targeting enforcement to the markets where harm is predictable makes it possible to effectively regulate harmful cases and protect consumers.

How Rising Corporate Market Power Undermines Democracy   

In new research, Seda Basihos investigates the relationship between a decline in market competition and global democratic backsliding. She finds that market concentration leads to increasing political power for giant firms—a trend that ultimately erodes democracy levels.

ProMarket in 2025

ProMarket’s writers review the topics that defined our coverage in 2025.

ProMarket’s Favorite Political Economy From 2025

Not sure how to cash in those bookstore gift cards? Here are ten suggestions from the Stigler Center staff. 1. Stuck: How the Privileged and the Propertied Broke the Engine of American Opportunity, by Yoni Appelbaum. Penguin Random House. For much of their history, Americans were a people on the move. In the late 19th century, a third of them changed houses every year. Today, a mere twelfth of Americans move annually. In Stuck: How the Privileged and the Propertied Broke...

The Ten Most Popular ProMarket Articles From 2025

ProMarket published 257 articles in 2024. Revisit some of our most popular pieces.

Top Five Capitalisn’t Episodes From 2025

A look back at the five most-listened-to Capitalisn’t episodes from 2025.

COLUMNS

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