1. Graduate Research Assistant, Agricultural, Food and Resource Economics, Michigan State University, 458 W Circle Dr, Michigan State University, East Lansing, MI 48824, USA.
2. Associate Professor, Department of Agricultural and Resource Economics, Colorado State University, 1200 Center Ave. Mall, Colorado State University, Fort Collins, CO 80523-1172, USA.
3. Professor, Department of Agricultural and Resource Economics, University of Tennessee Institute of Agriculture, 2621 Morgan Circle, 310 Morgan Hall, Knoxville, TN 37996, USA.