De quoi la transition écologique est-elle le nom ? Perspectives européennes et comparées

Presentation

This conference aims to examine a concept that has become central to public and legal debate: ecological transition. What does it really mean? What are its normative foundations, institutional manifestations and implications at the European level?

By combining national and European perspectives, this study day will analyse the legal frameworks, instruments and dynamics that structure ecological transition policies.

The conference will be held on Monday, 23 March 2026, from 9:00 a.m. to 5:30 p.m., at the Paris Institute for Advanced Study (IAS), located at 17 quai d'Anjou, 75004 Paris.

It is under the scientific direction of:

• Pauline Abadie, Senior Lecturer in Private Law at Université Paris-Saclay ;
• Benoît Blottin, Senior Lecturer in Public Law at Université Paris-Saclay.

Program

9:00 a.m.: Welcoming participants – coffee

9:00 a.m.: Opening
Bettina Laville, President of the Institute for Advanced Studies, Honorary State Councillor
Frédérique Coulée, Professor in Public Law, Deputy Vice-President for Research at Université Paris-Saclay
Benoît Blottin, Lecturer in Public Law at Université Paris-Saclay

10:00 a.m. - 11:15 a.m.: Penser la transition écologique comme projet politique
Presidency: Charles Vautrot-Schwarz, Professor in Public Law, Dean of the Faculté Jean Monnet DEM, Université Paris-Saclay
Christian Huglo, Lawyer, co-founder of the firm Cabinet Huglo Lepage
Nicolas de Sadeleer, Law professor, Facultés universitaires de Saint-Louis
Didier Kling, Member of CESE (Groupe entreprises)
Lucien Chabason, Member of CESE (Groupe environnement et nature)

11:30 a.m. - 1:00 p.m.: Mettre en œuvre la transition écologique : la force des acteurs
Presidency: Yann Paclot, Professor in Private Law at Université Paris-Saclay
Raphaël Brett, Senior Lecturer in Public Law at Université Paris-Saclay
Morgane Tirel, Senior Lecturer in Private Law at Université Evry
Tatiana Sachs, Professor in Private Law at Université Paris Nanterre
Valérie Nicolas-Hémar, Professor in management sciences at Université Paris-Saclay

Lunch break for speakers at the IEA.

2:00 p.m. - 3:30 p.m.: Préserver les milieux et écosystèmes à l’ère de la transition écologique
Presidency: Karine Abderemane, Senior Lecturer in Public Law at Université Paris-Saclay
Laurent Fonbaustier, Professor of Public Law at Université Paris-Saclay
Benoît Grimonprez, Professor of Private Law at Université de Poitiers
Aude Farinetti, Senior Lecturer in Public Law at Université Paris-Saclay
Mathilde Lacaze Masmonteil, Lawyer, research associate at IDEP

Coffee break

4:00 p.m. - 5:30 p.m.: Dialoguer, juger, agir (et désobéir) à l’ère de la transition écologique
Presidency: Delphine Placidi-Frot, Professor in Political Science, Vice-President of International and European Relations at Université Paris-Saclay
Séverine Saintier, Professor of Law, University of Exeter
& Isabelle Rueda, Senior Lecturer in law, University of Exeter
Tiago de Melo Cartaxo, Senior Lecturer in law, University of Exeter
& Swastee Ranjan, Lecturer in law, University of Exeter
Alexandre Faro, Lawyer, co-founder of the firm Faro & Gozlan
Pauline Abadie, Senior Lecturer in Private Law at Université Paris-Saclay

Closing cocktail

Terms of participation

Conference in person only, at the Paris IAS.
Hôtel de Lauzun, 17 quai d'Anjou, 75004 Paris.
Subway: Sully-Morland or Pont-Marie (line 7), Saint-Paul (line 1)
Bus: 67, 86

Registration is free and required, subject to availability, via the following link: https://admin-sphinx.universite-paris-saclay.fr/SurveyServer/s/RechercheDEG/Conferencele23mars2026IEA/questionnaire.htm

Contact: ingrid.mascle@universite-paris-saclay.fr

Organizers and financial supports

Institut d’Etudes de Droit Public and Institut Droit Ethique Patrimoine (IDEP) - Université Paris-Saclay.