1. Department of Agribusiness and Applied Economics; North Dakota State University; Richard H. Barry Hall, Room 402 Fargo ND 58102 USA
2. Department of Agricultural Economics and Agribusiness; University of Arkansas; Agriculture Building, Room 215 Fayetteville AR 72701 USA
3. Department of Agricultural Economics and Agribusiness; University of Arkansas; Agriculture Building, Room 226 Fayetteville AR 72701 USA
4. Department of Agricultural Economics and Agribusiness; University of Arkansas; Agriculture Building, Room 224 Fayetteville AR 72701 USA
5. Department of Agricultural Economics and Agribusiness; University of Arkansas; Agriculture Building, Room 218E Fayetteville AR 72701 USA