Jean-Michel Glachant, Professor, Florence School of Regulation, EUI, Florence and Advisor, Technology University POLITO, Turin, Italy, Manfred Hafner, Coordinator of the 'Energy: Scenarios and Policy' Research Programme, FEEM and Professor in International Energy Studies, Johns Hopkins University School of Advanced International Studies (SAIS-Europe) and Sciences-Po, Paris, France Jacques de Jong, Nicole Ahner, Scientific Coordinator of the Loyola de Palacio Chair; Research Assistant, Florence School of Regulation, European University Institute, Florence, Italy and Simone Tagliapietra, Researcher, Fondazione Eni Enrico Mattei (FEEM), Milan, Italy