[1] Univ Parma, Dept Food & Drug, Parco Areadelle Sci 45, I-43124 Parma, Italy
[2] Univ Coll Dublin, Sch Agr & Food Sci, Dublin, Belfield, Ireland
[3] Michigan State Univ, Dept Agr Food & Resource Econ, E Lansing, MI USA
[4] Cornell Univ, Charles H Dyson Sch Appl Econ & Management, Ithaca, NY USA
[5] Univ Ghent, Dept Agr Econ, Ghent, Belgium