Gildas de Muizon

Deloitte (Paris)

Dr Gildas de Muizon is a partner and head of the Economic Advisory practice at Deloitte France. For 10 years, he was the managing partner of Microeconomix, a French economic consultancy acquired by Deloitte France in 2016. He has extensive experience advising clients on complex economic and data issues. He is an expert in competition, IP and regulatory economics and manages a strong team of econometricians and data scientists to help his clients and their lawyers in a variety of litigation cases. In the antitrust area, Dr de Muizon has advised on a variety of competition law issues and provides sound economic expertise applied to antitrust and competition law proceedings before the European Commission and national competition authorities (mergers and acquisitions, abuse of dominance, cartels, compliance audits). He has provided several written and oral testimonies in competition policy cases. Dr de Muizon has also served as an expert in commercial and contractual litigations before French courts and international arbitrations. He is a respected specialist in damage assessment. He acted a party-appointed expert in many major follow-on claims before French courts. In 2015, he was appointed as economic expert for the Paris Court of Appeal (“expert judiciaire”) and can serve as tribunal-appointed expert. Dr de Muizon graduated in executive science and management from Mines ParisTech (2001) and received his PhD in economics from University of Paris X and Mines ParisTech (2006).

Linked authors

Université de Rennes
Deloitte (Paris)
Vogel & Vogel (Paris)
French General Inspectorate of Finance (Paris)
European Commission (Brussels)
Deloitte (Paris)
Cleary Gottlieb Steen & Hamilton (Washington)
US Attorney’s Office, Southern District of Ohio


Gildas de Muizon - Transposition de la directive Dommages - 10 mars 2017
Gildas de Muizon 10 March 2017 Paris


10661 Review

Bruno Lasserre, François Lévêque, Françoise Benhamou, Frédéric Jenny, Gildas de Muizon, Harry First, Mario Siragusa, Olivier Fréget, Thibaud Simphal Disruptive innovation, law and competition (Paris, 29 January 2016)


L’innovation déplace aujourd’hui les positions établies d’un nombre croissant d’entreprises et d’industries. Les qualificatifs ne manquent pas pour souligner la puissance de ce phénomène : innovation drastique, innovation déstabilisante, innovation perturbatrice, innovation radicale, innovation de (...)

Gildas de Muizon Economic proof in anticompetitive practices’ detection


Different tests have been proposed by the economic literature and used by competition authorities in order to detect anticompetitive conducts. No single test is suitable for every type of practice and the economic theory can help in choosing the most relevant one. I. Une voie médiane entre (...)

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