[1
] Grumets Research Group, Department of Geography, Universitat Autònoma de Barcelona,
Edifici B, Campus de la UAB, Barcelona, Spain
[2
] GRATS Research Group, Department of Geography, Universitat Autònoma de Barcelona,
Edifici B, Campus de la UAB, Barcelona, Spain
[3
] Council for Agricultural Research and Economics (CREA), Rome, Italy