Affiliation: | Department of Agricultural Economics, California State University Fresno, 5245 N Backer Avenue, M/S PB101, Fresno, CA 93740, USA;Department of Agricultural and Applied Economics, University of Georgia, Conner Hall, Athens, GA 30602, USA;Department of Animal and Dairy Science, University of Georgia, P.O. Box 748, Coastal Plain Experiment Station, Tifton, GA 31793, USA |