Liam Colley

Senior Vice President


  • London | Brussels


    • King’s College London, M.A.
    • Birkbeck, University of London, M.Sc. (with distinction)
    • University of Sussex, B.Sc.

Liam Colley heads Cornerstone Research’s European competition practice. Mr. Colley is a testifying economics expert specializing in competition, antitrust damages, and economic regulation issues. He has more than twenty-five years of experience as a consultant and testifying expert. His experience includes multiple high-profile matters before U.K. and European Union courts and competition regulators. Citing the “unassailable quality of his work,” Who’s Who Legal has named Mr. Colley a leading competition economist, as well as a Thought Leader and Global Leader in the competition field.

Antitrust and competition

Mr. Colley has consulted on a range of competition matters before the European Commission, national competition authorities, regulators, and courts. His expertise includes matters arising in automotive; financial services; insurance; technology, media, and telecom (TMT); and transportation. He has supported clients on numerous antitrust investigations and market inquiries. In addition, Mr. Colley has worked on multiple mergers, particularly on matters involving efficiencies and failing firm defenses.

Antitrust damages

Mr. Colley has wide experience estimating damages that arise from breaches of competition rules. In cartel damages matters, he has prepared numerous expert reports in the context of high court litigation, arbitration, mediation, and settlement negotiations. He has addressed class action issues and worked on many stand-alone and follow-on actions in abuse of dominance cases.

Mr. Colley has served as a testifying expert before the U.K. High Court and the U.K. Competition Appeal Tribunal (CAT) on both antitrust damages matters and regulatory appeals.

Mr. Colley publishes and speaks widely on competition and damages issues. Before joining Cornerstone Research, for many years he led the global economics practice of a major professional consulting firm.

Professional Affiliations
    • Association of Competition Economics (ACE)
    • British Institute of International and Comparative Law

The European Class Actions Forum 2024


The Competition Collective Actions Forum 2024

Press Release

Cornerstone Research Named Among 2024 Outstanding Global Economic Consultancies

Press Release

2024 Antitrust Writing Awards

Press Release

Cornerstone Research Further Expands in Europe with Brussels Office

Press Release

WWL: Competition Global Leaders and Consulting Experts 2023


Recent CAT judgments yield lessons on the collection and submission of economic evidence


The Competition Collective Actions Forum 2023

  • “Transatlantic Antitrust Class Actions,” New York State Bar Association 2022 London Global Conference, 1 December 2022
  • “Calculating Damages in Cross-border Cases,” Global Class Actions Symposium 2022, 18 November 2022
  • “Lessons Learnt for Structuring Class Actions and Resisting Certification,” GCR Live: Competition Litigation 2022, 6 October 2022
  • “Transatlantic Antitrust Class Actions,” 49th Annual Conference on International Antitrust Law and Policy and Antitrust Economics Workshops, Fordham University School of Law, 14 September 2022