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Latin Antitrust Chronicles: September 2025-March 2026

11 May 2026Carlos Ragazzo, Marcela Mattiuzzo, Bruna Cataldo, and Clara Duarte

This edition of the Latin Antitrust Chronicles provides an overview of the main developments that took place in late 2025 and early 2026 across Argentina, Brazil, and Mexico. The developments in Argentina and Mexico, on the one hand, focus on changes implemented in the respective antitrust regimes, whereas the updates from Brazil, on the other hand, suggest a stronger focus on digital markets and potential adoption of ex ante regulatory enforcement. This overview helps set out the complex and ever-evolving...

ANTITRUST

DIGITAL LAW

COMPLEXITY SCIENCE

LATEST PUBLICATIONS

31 March 2026

Reading suggestions – March 2026

Here are Thibault Schrepel's monthly reading suggestions. Topics include AI's reshaping of research and publishing, end-to-end automation of scientific inquiry,...

26 March 2026

Fairness and Redistribution in Antitrust Law

Many parts of the legal system pursue “fair” distributions of wealth or economic status. Antitrust law does not. The antitrust...

23 March 2026

The Matthew Effect at Scale: Attention Scarcity and the AI Output Explosion

Generative AI is lowering the marginal cost of academic writing. A natural prediction is that this will allow more researchers...

2 March 2026

Reading suggestions – February 2026

Here are Thibault Schrepel’s monthly reading suggestions. Topics include the constitutional limits of the Digital Markets Act, antitrust’s fixation on...

30 January 2026

Reading suggestions – January 2026

Here are Thibault Schrepel’s monthly reading suggestions. Topics include market power and competition regimes, the limits of AI scaling, the...

2 January 2026

The world’s most downloaded antitrust articles of 2025

As for previous years, here are the world’s most downloaded antitrust and competition law articles posted on SSRN during 2025.

1 January 2026

Reading suggestions – December 2025

Here are Thibault Schrepel’s monthly reading suggestions. Topics include measure market power, nascent competition and killer acquisitions, the end of...

22 December 2025

Antitrust Antidote: October-December 2025

There were a number of decisions from October through December 2025, including: (1) FTC v. Meta, in which the court...

15 December 2025

The Enigmas of Monopoly Power

Market power can be assessed in antitrust cases by two methods often described as “alternatives”. For unilateral conduct, however, they...

12 December 2025

Understanding Digital Sovereignty in the Age of Artificial Intelligence

EU Digital Sovereignty has emerged as a key policy topic amid growing geopolitical tensions fuelled by an AI arms race...

8 December 2025

Return-to-Office Policies and AI Knowledge Sharing: A Game-Theoretic Analysis

We develop a game-theoretic model to analyze optimal workplace arrangements in AI-enhanced teams where knowledge sharing is subject to location-dependent...

5 December 2025

European Digital Sovereignty: From Naïveté to Sustainability?

Two decades of hyperactive EU digital rule-making have not delivered “digital sovereignty,” but instead exposed a strategic naïveté: Brussels built...

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SERIES

US Antitrust Cases

By Koren W. Wong-Ervin

EU Competition Cases

By Alice Setari and Mario Siragusa

Latin American Cases

By Marcela Mattiuzzo

TECH MONOPOLY

BY HERBERT HOVENKAMP

Crane's Cartel

By Daniel Crane

SPECIAL GUESTS

Academics Only

23 August 2021
Randal C. Picker: “Security Competition and App Stores”
Dear readers, I am delighted to announce that this month’s guest article is authored by Randal C. Picker, James Parker Hall Distinguished Service...
24 April 2023
Ramsi A. Woodcock: “Antimonopolism as a Misunderstanding of Power”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Ramsi A. Woodcock, Associate...
17 January 2020
Herbert Hovenkamp (guest article): On The Meaning of Antitrust’s Consumer Welfare Principle
Dear readers, I am incredibly happy and honored to introduce a new series in which, every month of the year 2020, I...
27 January 2022
Richard J. Gilbert: “The American Innovation and Choice Online Act”
Dear readers, I am delighted to announce that thisbe month’s guest article is authored by Richard J. Gilbert, Distinguished Professor Emeritus of Economics at the...
21 October 2024
Axel Gautier: “Big Tech Acquisitions And The Ghost Products”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Axel Gautier, Professor at...
15 August 2022
Ariel Ezrachi and Maurice E. Stucke: “The Darker Sides of Digital Platform Innovation”
Dear readers, I am delighted to present you with this month’s guest article by Ariel Ezrachi, Slaughter and May Professor of...
8 February 2021
A. Douglas Melamed (guest article): “Acquisitions of Nascent Competitors under Section 2 of the Sherman Act”
Dear readers, In 2020, I started publishing monthly guest articles written by some of the world’s most renowned antitrust scholars. The series continues in 2021....
24 September 2024
Richard N. Langlois: “Memes and Myths of Antitrust”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Richard N. Langlois, Professor...
20 October 2020
Mark A. Lemley & Andrew McCreary (guest article): How Venture Capital’s “Exit Strategy” Drives Tech Industry Concentration
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles written by the world’s most renowned antitrust scholars every month...
15 September 2022
Dennis W. Carlton: “How to make sensible merger policies?”
Dear readers, I am delighted to present you with this month’s guest article by Dennis W. Carlton, Professor of Economics Emeritus...
31 July 2021
Alexandre de Streel (guest article): “Why Legislators Want to Move Fast and Break Things in the Cyberspace?”
Dear readers, I am delighted to announce that this month’s guest article is authored by Alexandre de Streel, Professor of digital law at...
2 April 2021
Douglas H. Ginsburg & Jacob Philipoom (guest article): “A Certain Harm Overlooked: The Case of Nascent Competitors Revisited”
Dear readers, In 2020, I started publishing monthly guest articles written by some of the world’s most renowned antitrust scholars. The series continues in 2021....
25 March 2022
Okeoghene Odudu: “Do competition agencies harm welfare?”
Dear readers, I am delighted to announce that this month’s guest article is authored by Okeoghene Odudu, Associate Professor, Faculty of Law; Fellow...
17 December 2020
Joshua D. Wright & Alexander Krzepicki (guest article): “Rethinking Foreclosure Analysis in Antitrust Law: From Standard Stations to Google”
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles written by the world’s most renowned antitrust scholars every month...
30 August 2023
Luc Soete and Sven Van Kerckhoven: “Deglobalisation and competition policy: the challenge to European economic integration”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Luc Soete, Dean of...
2 May 2022
Thomas B. Nachbar: “An America Fit for the Digital Age?”
Dear readers, I am delighted to announce that this month’s guest article is authored by Thomas B. Nachbar, Professor of Law at the...
16 September 2021
Richard N. Langlois: “It’s Not Easy Being a Schumpeterian”
Dear readers, I am delighted to announce that this month’s guest article is authored by Richard N. Langlois, Professor of Economics at the...
7 November 2023
Marina Lao: “FTC Rulemaking on Noncompetes”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Marina Lao, Edward S....
5 June 2023
The Limits of Antitrust Remedies: Brunswick v. Pueblo Bowl-O-Mat for the FTC
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by James C. Cooper, Professor...
14 December 2023
Jason Potts: “Future Markets and the Social Discount Rate: A New Approach to Dynamic Competition Policy”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Jason Potts, Distinguished Professor...
17 May 2021
George L. Priest (guest article): “What to do about the Big Tech Monopolies?”
Dear readers, I am delighted to announce that this month’s guest article is authored by George L. Priest, Edward J. Phelps Professor of Law...
15 December 2022
Alan J. Meese: “The Constitutional Moment That Wasn’t: 1912-1914 and the Meaning of the Sherman Act”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Alan J. Meese, Ball Professor...
9 March 2020
William Kovacic (guest article): "Roads Not Taken: The Federal Trade Commission and Google"
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles written by several of the world’s most renowned antitrust...
4 May 2023
Joseph Farrell: “Looking at More Evidence in Antitrust”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Joseph Farrell, Professor of...
6 July 2020
Frédéric Jenny (guest article): “Market adjustments, Competition Law and the Covid-19 Pandemic”
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles written by several of the world’s most renowned antitrust scholars...
17 February 2020
Daniel Crane (guest article): Democracy and Monopoly in Governments, Markets, and Firms
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles authored by some of the world’s most renowned antitrust...
6 June 2022
Renato Nazzini: “Mergers in the Digital Economy”
Dear readers, I am delighted to present you with this month’s guest article by Renato Nazzini, Professor of Law at King’s...
18 June 2025
Towards Efficient Data Sharing in Platform Markets
Platforms collect valuable data that they do not share. Welfare then suffers as information asymmetry produces market failures. Current proposals...
6 September 2023
Anu Bradford: “What is at Stake if Antitrust Regulation Fails?”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Anu Bradford, Henry L. Moses Professor...
15 March 2023
Drew Fudenberg and David K. Levine: “Adjusting to Change in Complex Systems”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Drew Fudenberg, Professor of Economics...
23 January 2021
Pablo Ibáñez Colomo (guest article): “Be Careful What You Wish For”
Dear readers, In 2020, I started publishing monthly guest articles written by some of the world’s most renowned antitrust scholars. The series continues in 2021....
3 November 2022
Daniel F. Spulber: “How Do Vertical Mergers Affect Innovation? Learning from Illumina”
"How Do Vertical Mergers Affect Innovation? Learning from Illumina", this month's guest contribution by Daniel F. Spulber, Professor of International...
6 April 2020
Eleanor Fox (guest article): "POWER: Trust and Distrust"
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles written by several of the world’s most renowned antitrust scholars...
26 August 2022
Jonathan B. Baker: “A Competitive Process Goal Won’t Strengthen Antitrust”
Dear readers, I am delighted to present you with this month’s guest article by Jonathan B. Baker, Research Professor of Law...
8 February 2022
Richard Epstein: “The Unwise Extension of Antitrust Law to Labor Markets”
Dear readers, I am delighted to announce that this month’s guest article is authored by Richard Epstein, Laurence A. Tisch Professor of Law at...
27 October 2025
An effects-based approach to the DMA?
The EU’s Digital Markets Act (DMA) uses per se prohibitions to regulate “gatekeepers,” prioritising rapid enforcement over case-specific effects analysis....
21 November 2022
Ioannis Lianos: “Mind The (Institutional) Gap: Digital Economy, Competition Law and The Toolkit Approach”
Far from its depiction as a well-defined and linear techno-social phenomenon that developed incrementally over the last three decades following...
15 November 2022
William H. Page & John E. Lopatka: “Parker v. Brown, Legislative Immunity, and Anticompetitive State Regulation”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by William H. Page, Marshall M....
18 October 2021
Peter G. Klein: “Who Owns My Data?“
Dear readers, I am delighted to announce that this month’s guest article is authored by Peter G. Klein, Professor of Entrepreneurship at Baylor...
25 March 2024
Daron Acemoglu and Simon Johnson: “The Urgent Need to Tax Digital Advertising”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Daron Acemoglu, Institute Professor...
2 November 2023
Vincent Martenet: “Separation of Powers and Antitrust”
The separation of powers principle and antitrust both relate to power and, notably, deal with the concentration of power. However,...
27 October 2022
Thomas W. Hazlett: The FTC’s Rendition of the “Cellophane Fallacy”
In the pending case of FTC v. Facebook, the Government alleges price increases for the “free” service. In this zero-price...
22 July 2025
How Employee Networks Drive Innovation, and How Remote Work Alters Both
Our research examines how employee collaboration networks within companies affect the quality of innovation, using data from over 28,000 employees...
16 June 2020
Scott Hemphill (guest article): “Uncertain Harms: The Case of Nascent Competitors”
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles written by several of the world’s most renowned antitrust scholars...
2 November 2021
Diane Coyle: “Practical approaches to data in competition policy”
Dear readers, I am delighted to announce that this month’s guest article is authored by Diane Coyle, Bennett Professor of Public Policy at...
20 August 2020
Michael Carrier (guest article): “Why Do Courts Err in Pharmaceutical Antitrust Cases?”
Dear readers, As previously announced, I am incredibly happy and honored to publish guest articles written by the world’s most renowned antitrust scholars every month...
11 September 2023
Justin (Gus) Hurwitz: “A Bad Merger of Process and Substance: Changing the Merger Guidelines and Premerger Review Form”
On June 27, 2023, the Federal Trade Commission (“FTC”) announced proposed changes to Hart-Scott-Rodino Act (“HSR Act”) premerger notification form....
4 April 2024
Herbert Hovenkamp: “Antitrust Market Definition: the Hypothetical Monopolist and Brown Shoe”
Dear readers, the Network Law Review is delighted to present you with this month’s guest article by Herbert Hovenkamp, James B. Dinan...
15 June 2022
Lawrence J. White: “A Riff and a Half on the Delineation of Relevant Markets in Antitrust Cases”
Dear readers, I am delighted to present you with this month’s guest article by Lawrence J. White, Robert Kavesh Professor of...
9 March 2021
Michal Gal (guest article): “Do our Privacy Laws Strengthen the Already Strong?”
Dear readers, In 2020, I started publishing monthly guest articles written by some of the world’s most renowned antitrust scholars. The series continues in 2021....