A. Denny Ellerman is Senior Lecturer at the Sloan School of Management, Massachusetts Institute of Technology. Frank J. Convery is Heritage Trust Professor of Environmental Policy at University College Dublin. Christian de Perthuis is Associate Professor of Economics at the University Paris-Dauphine and Head of the Mission Climat of the Caisse des Dépôts, France. Emilie Alberola is Research Fellow at the Mission Climat of the Caisse des Dépôts, France. Richard Baron is Head of the Climate Change Unit at the International Energy Agency, France. Barbara K. Buchner is Senior Energy and Environment Analyst at the International Energy Agency (IEA), France. Anaïs Delbosc is a researcher at the Mission Climat of the Caisse des Dépôts, France. Cate Hight is Research Fellow at the Mission Climat of the Caisse des Dépôts, France. Jan Horst Keppler is Professor of Economics at the University of Paris–Dauphine and Director of the Energy program at the French Institute of International Relations (IFRI).