1. Professor, Agricultural and Applied Economics , University of Georgia , 206 Stuckey Building, 1109 Experiment Street , Griffin , GA , 30223 , USA
2. Resident Scholar , American Enterprise Institute , 1789 Massachusetts Avenue , Washington , DC , 20036 , USA
3. Economist, Research and Methodology Group (RMG), International Directorate, Bureau of Economic Analysis , U.S. Department of Commerce , 4600 Silver Hill Road , Suitland , MD , 20746, USA
4. Senior Research Fellow, Agriculture for Nutrition and Health (A4NH) , International Food Policy Research Institute (IFPRI) , 1301 I Street NW , Washington , DC , USA