Giovanni Anania Dipartimento di Economia e Statistica Università della Calabria 87030 Arcavacata di Rende (Cs), Italy E-mail: ganania@unical.it Tel.: +39-0984-492406 – Fax: +39 0984 492409	Mary E. Bohman Economic Research Service United States Department of Agriculture 1800 M Street, N.W. Washington, DC 20036-5831 E-mail: mbohman@ers.usda.gov Tel.: +1-202-6945140 – Fax: +1-202-6945795
Colin A. Carter Department of Agricultural and Resource Economics University of California, Davis and Giannini Foundation of Agricultural Economics Davis, CA 95616, Usa E-mail: colin@primal.ucdavis.edu Tel.: +1-530-7526054 – Fax: +1-530-7525614	Alex F. McCalla Department of Agricultural and Resource Economics University of California, Davis and Giannini Foundation of Agricultural Economics Davis, CA 95616, Usa E-mail: alex@primal.ucdavis.edu Tel.: +1-530-7521529 – Fax: +1-530-7525614