Affiliation: | 1. George Mason University, United States;2. International Food Policy Research Institute, United States;3. University of Pittsburgh, United States;4. NBER, United States;1. Department of Economics, Kansas State University, 327 Waters Hall, 1603 Old Claflin Place, Manhattan, KS 66506, USA;2. Department of Business, Rollins College, 1000 Holt Ave - Box 2779, Winter Park, FL 32789, USA;1. University of Pennsylvania, 133 S. 36th Street, Office 429, Philadelphia, PA 19104, USA;2. School of Advanced International Studies, Johns Hopkins University, 1619 Massachusetts Avenue Johns Hopkins University Washington, DC 20036 USA;3. Department of Government, Dartmouth College, Silsby Hall, Hanover, NH 03755 USA |