[1] Univ Amsterdam, Dept Polit Sci, Amsterdam, Netherlands
[2] Univ Bonn, German Inst Dev & Sustainabil IDOS, Bonn, Germany
[3] Erasmus Mundus Masters Environm Sci MESPOM, Lund, Sweden
[4] Justus Liebig Univ Giessen, Inst Agr Policy & Market Res, Giessen, Germany
[5] European Univ Inst, Robert Schuman Ctr Adv Studies, Fiesole, Italy
[6] Univ Amsterdam, Dept Polit Sci, Nieuwe Achtergracht 166, NL-1018 WV Amsterdam, Netherlands