Antitrust Chronicle® – Market Definition
Antitrust Chronicle® September 2025 Volume 1
Dear Readers, Market definition is perhaps the most important part of any antitrust analysis. It is the necessary starting point in all merger reviews and abuse of dominance cases. Yet its role is increasingly questioned. This CPI Antitrust Chronicle takes a clear-eyed look at those questions. Herbert Hovenkamp opens with a...
In this issue
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
In case you missed it...

April
This Chronicle explores the rapidly evolving intersection of foreign direct investment and technology, a space where traditional assumptions about openness, control, and market integration are being fundamentally reworked.

March
This Chronicle brings together contributions that explore the evolving relationship between industrial policy, competition, regulation & technological change from complementary angles.

February
This month’s TechREG Chronicle focuses on online consumer protection, at a moment when regulators on both sides of the Atlantic are reassessing how legacy consumer-protection frameworks apply in digital, data-driven markets.
See more Chronicles by year:
Featured News
Italian Antitrust Authorities Open Probe Into Telecom Network-Sharing Deal
May 11, 2026 by
CPI
Coalition of Attorneys General Calls for Expanded State Powers in Antitrust Fight
May 11, 2026 by
CPI
Shein Accuses Temu of Mass Copyright Infringement in UK Legal Battle
May 11, 2026 by
CPI
Fed Survey Finds Increased Worries About AI’s Impact on Financial Stability
May 11, 2026 by
CPI
OpenAI Offers EU Access to New Cyber Model as Anthropic Talks Continue
May 11, 2026 by
CPI