1. Department of Applied Economics and Marketing, School of Agriculture, Policy and Development, University of Reading, Reading RG6 6AR, United Kingdom;
2. MAPP Centre–Research on Value Creation in the Food Sector, Department of Management, Aarhus University, Aarhus DK-8210, Denmark
3. Department of Agricultural Economics and Agribusiness, University of Arkansas, Fayetteville, Arkansas 72701, USA