Marc is an economist interested in climate change and energy policies. Since 30 years, he has participated in the development and the management of several macro-energy models (Hermes-France, Micro-Melodie, GEM-E3, PRIMES). Since 20 years, he works on CGE model GEMINI-E3. As an expert, he was involved in several International and National projects on policies against climate change and he has consulted a number of public and private organizations. He has over 50 publications in learned journals (with 110 co-authors). Marc Vielle obtained a PhD in economics from the University Panthéon-Sorbonne (Paris). His current research focuses on the Swiss climate policy, the economic impacts of climate change, the Paris Agreement, and the European climate policy.