Compass Lexecon (Paris)

Guillaume Duquesne

Compass Lexecon (Paris)
Senior Vice President

Guillaume Duquesne is a senior vice president at Compass Lexecon, based in Paris. Since joining in 2013, he has advised clients on a wide variety of competition policy issues, covering sectors as diverse as energy, telecommunication, financial services, and travel agencies. Guillaume Duquesne has advised clients in merger or antitrust cases at the European Commission level and at the level of the French competition authorities. Prior to joining Compass Lexecon, Guillaume Duquesne worked as a quantitative analyst for Crédit Agricole – Corporate Investment Bank where he specialized in risks management as well as derivatives pricing and interest rate curve modelling. He also conducted an in-depth analysis of EDF trading strategies in collaboration with the economic department of Polytechnique and the Research and Development department of EDF. Guillaume Duquesne graduated the Ecole Normale Supérieure (France, Cachan) where he specialized in economics, mathematics and finance. He holds an M.Sc. in Economics from the Paris School of Economics and an M.Sc. in Quantitative Finance from Pierre and Marie Curie University. He has held various research/teaching assistant positions.

Linked authors

Compass Lexecon (Madrid)
Compass Lexecon (Brussels)
American University’s Washington College of Law (Washington)
Compass Lexecon (Hong Kong)
Compass Lexecon (London)


240 Bulletin

David Sevy, Elena Zoido, Guillaume Duquesne, Soledad Pereiras The French Competition Authority dismisses collusion case against car rental companies due to lack of evidence that exchange of information led to strategic changes in their behavior (Europcar / Avis / Citer / Hertz / Sixt / EDA)


When Information Is Not (Market) Power: Using Quantitative Techniques To Show That Information Exchange Did Not Facilitate Collusion* Abstract On January 2015, the French competition authority claimed that some car rental companies infringed competition law by sharing monthly information (...)

2387 Review

Guillaume Duquesne, Karthik Balisagar, Miguel de la Mano, Renato Nazzini, Thomas P. Brown The implications of bitcoin for competition, antitrust, and regulation in the banking industry


This series of articles explores the implications of blockhain for competition in the banking industry. Each of the articles takes a slightly different perspective on the issue. The first explores whether existing antitrust doctrine is suitable for assessing the potential benefits and harms (...)


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