2023 Merger Guidelines

In new research, Filippo Lancieri and Tommaso Valletti analyze the shortcomings of the current merger review system and defend stronger rebuttable structural presumptions as an important step forward.

John Kwoka writes that the antitrust agencies under President Joe Biden made thoughtful revisions to the Merger Guidelines that will strengthen enforcement and competition. However, they still fall short in their treatment of the structural presumption and efficiencies defense, where both economics and the law provide grounds for strengthening. Current practices strain agency resources and permit anticompetitive mergers and acquisitions. The next administration must revisit these two issues.

Herbert Hovenkamp applauds the Biden administration’s antitrust authorities for intervening in labor markets and more robustly challenging mergers between competitors. However, the next administration should clarify in its guidance that the objective of stronger antitrust enforcement must focus on lowering prices, increasing output, and removing any restraints on innovation.

ProMarket interviewed Assistant Attorney General Jonathan Kanter at the 2024 Stigler Center Antitrust and Competition Conference.

Jonathan B. Baker provides his reactions to the final 2023 Merger Guidelines, including why they strengthen enforcement and where the antitrust enforcement agencies can further clarify their merger analysis.

Steven C. Salop evaluates the final version of the 2023 Merger Guidelines on vertical merger analysis and certain rebuttal arguments. He finds that the final Guidelines successfully incorporate developments in the economic scholarship and update antitrust enforcement with the tools to analyze non-horizontal mergers in an increasingly digital economy.

The Department of Justice Antitrust Division and Federal Trade Commission released their completed version of the new 2023 Merger Guidelines. Susan Athey, Chief Economist for the DOJ Antitrust Division, and Aviv Nevo, Director of the FTC’s Bureau of Economics, explain how the revised document addresses the comments they received on the Draft Merger Guidelines that were expressed in ProMarket and elsewhere.

The final version of the Agencies’ Merger Guidelines are a thoughtful improvement over the draft version, writes Fiona Scott Morton. Both the economic and legal analysis in the final version promise to more effectively prevent harmful mergers and bring U.S. antitrust into the modern age.

Former special assistant to the president for technology and competition policy Tim Wu responds to the November 27 letter signed by former chief economists at the Federal Trade Commission and Justice Department Antitrust Division calling for a separation of the legal and economic analysis in the draft Merger Guidelines.

Seventeen former chief economists of the Federal Trade Commission and the Department of Justice Antitrust Division urge current Agency heads to separate the legal and economic analysis in the draft Merger Guidelines to strengthen the role of the latter in merger review.