1. Fondazione Eni Enrico Mattei, Milan, Italy and Basque Centre for Climate Change Bizkaia Spain
2. Fondazione Eni Enrico Mattei, Milan Italy and Catholic University of Milan Milan Italy
3. Fondazione Eni Enrico Mattei, Milan, Italy and Gran Sasso Science Institute Milan Italy
4. School of Economic Sciences, Washington State University Washington USA
5. Fondazione Eni Enrico Mattei Milan Italy