1. Department of Agricultural and Applied Economics University of Missouri, Faculty member at INSPER Business School 125 Mumford Hall Columbia MO 65211‐6200 USA
2. School of Agriculture Western Illinois University 313 Knoblauch Hall Macomb IL 61455 USA
3. Dyson School of Applied Economics and Management Cornell University 340D Warren Hall Ithaca NY 14853 USA
4. Department of Agricultural, Food, and Resource Economics Michigan State University Justin S. Morrill Hall of Agriculture, 446 West Circle Drive, Rm. 317B East Lansing MI 48824‐1039 USA