University of Paris I Panthéon-Sorbonne (Paris)

Claude Lucas de Leyssac

University of Paris I Panthéon-Sorbonne (Paris)
Former Professor

Claude Lucas de Leyssac (1945-2015) was Professeur agrégé of the universities of Reims (1976), Nanterre (1980) and Paris I (1991), and was Director of the Institute d’Etudes Judiciaires Paris I - Jean Domat. He was also the author of numerous publications and reference works. Claude Lucas de Leyssac had set up and run the Competition and Distribution department.

In Memoriam

Linked authors

University of Paris I Panthéon-Sorbonne (Paris)
University of Paris I Panthéon-Sorbonne (Paris)
University of Paris I Panthéon-Sorbonne (Paris)
University of Paris I Panthéon-Sorbonne (Paris)
French Competition Authority (Paris)


24102 Review

Claude Lucas de Leyssac Financial sanction or fine?


The ruling of the Paris Court of appeal in the steel cartel case raises one more time an irritating phenomenon of French competition law : the substantial reduction by the Court of appeal of financial sanctions imposed by the Competition Authority. Such a state must cease as it leads to fuzzy (...)

Claude Lucas de Leyssac Absence of competition is not punishable !


In this Foreword, Lucas de Leyssac, Counsel and Professor, welcomes the growing influence of economics in the competition law analysis and claims that the absence of any existing competition should not be sanctioned. Economic analysis of law is in fashion. As if one were to discover, in (...)

Claude Lucas de Leyssac Arbitration and competition law : Return to Eco Swiss


This foreword is a brief comment on the Thales arbitral sentence decision held by the Paris Court of Appeal on the 18 November 2004 (1st chamber C) 18 novembre 2004 par la première chambre C de la cour de Paris The importance of the role of the judge in the implementation of competition law has (...)


Price 45€00 A quoi sert la concurrence ?

See the "avant-propos" of Laurence Idot, Frédéric Jenny et Nicolas Charbit the Foreword of Martine Béhar-Touchais The full list of contributors and the Table of Contents 100 contributions for the (...)

Date 30 September 2014
Author(s): Martine Behar-Touchais, Nicolas Charbit, Rafael Amaro
Price 45€00
Read online