1. Charles H. Dyson School of Applied Economics and Management; Cornell University; 451B Warren Hall, 137 Reservoir Road Ithaca NY 14853
2. Department of Agricultural and Consumer Economics; University of Illinois; 326 Mumford Hall, 1301 W. Gregory Drive Urbana IL 61801
3. Economic Research Service, U.S. Department of Agriculture; 1400 Independence Ave., SW, Mailstop 1800 Washington D.C. 20520-1800