Author Statement
editors: Thomas Bournaris, Department of Agricultural Economics Aristotle University of Thessaloniki, Thessaloniki, Greece; Julio Berbel, University of Cordoba, Campus de Rabanales, Cordoba, Spain; Basil Manos, Department of Agricultural Economics, Aristotle University of Thessaloniki, Thessaloniki, Greece; Davide Viaggi, Department of Agricultural Economics and Engineering University of Bologne Viale Fanin, Bologna, Italy
