[1] Univ Copenhagen, Inst Food & Resource Econ, DK-1168 Copenhagen, Denmark
[2] Univ Pablo de Olavide, Dept Econ, Seville, Spain
[3] Catholic Univ Louvain, CORE, Louvain, Belgium
[4] Univ So Denmark, Dept Econ & Business, DK-5230 Odense M, Denmark
[5] Univ So Denmark, Ctr Hlth Econ Res, DK-5230 Odense M, Denmark