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Frances Dethmers



Dethmers Frances
Frances Dethmers



Frances' practice focuses upon European competition law. She has extensive experience in advising clients from a wide range of industries on merger control procedures, cartel investigations, abuse of dominance investigations, intellectual property issues and licensing and distribution agreements.

Prior to joining Allen & Overy, Frances spent sixteen years at another leading law firm practicing competition law, including eleven years as a Counsel, splitting her time between Brussels and Amsterdam. Before that, Frances worked for the Dutch Competition Authority as well as for the European Commission, where she gained first-hand knowledge of their internal procedures.

Frances has degrees in economics and law from the University of Amsterdam. As a result, she has an in-depth understanding of the economic concepts and analytical techniques at the heart of competition law.

Frances is the co-author of ‘The Economic Assessment of Mergers under European Competition Law’ and a regular contributor of articles that provide insights into the latest antitrust developments.

Related articles

Publications: 24 June 2022

Antitrust in focus - June 2022

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Publications: 01 March 2021

Antitrust in focus - February 2021

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Experience highlights



Tervurenlaan 268A avenue de Tervueren

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Admitted as a lawyer (Netherlands), 2012


Free University of Amsterdam, master degree in law, 2001

Free University of Amsterdam, master degree in economics, 1998


Published work

  • “Taking a closer look: There is now a greater scrutiny of misleading information in EU merger cases”, CLI, 9 May 2017
  • “A tougher climate – EU merger control has become more challenging”, CLI, 20 September 2016
  • “EU merger control: out of control?”, E.C.L.R., Issue 11, 2016