1. RSK ADAS Limited, 4205 Park Approach, Leeds LS15 8GB, UK
2. School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
3. Department of Work Science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, P.O. Box 88, SE-230 53 Alnarp, Sweden
4. Department of Agricultural Economics, Higher Technical School of Agricultural and Forestry Engineering (ETSIAM), University of Córdoba, Rabanales University Campus, 14071 Córdoba, Spain
5. Faculty of Business and Law, School of Strategy, Marketing and Innovation, University of Portsmouth, Portsmouth PO1 2UP, UK
6. Department of Regional and Business Economics (FRDIS), Mendel University in Brno, 613 00 Brno, Czech Republic