[1] INSEAD, Blvd Constance, F-77305 Fontainebleau, France
[2] Assoc Study Peak Oil & Gas, Ballydehob, County Cork, Ireland
[3] Recycled Energy Dev, Westmont, IL 60559 USA
[4] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany
[5] Econ & Human Dimens Res Associates, Tucson, AZ 85750 USA
[6] ICREA, Barcelona, Spain
[7] Vrije Univ Amsterdam, Amsterdam, Netherlands
[8] Univ Autonoma Barcelona, Inst Environm Sci & Technol ICTA, Cerdanyola Des Valles 08193, Barcelona, Spain
[9] Univ Freiburg, D-79085 Freiburg, Germany