[1] Texas A&M Univ, Dept Agr Econ, 6200 Tres Lagos Blvd, Mcallen, TX 78504 USA
[2] Univ Florida, Food & Resource Econ Dept, 1155 McCarty A, Gainesville, FL 32611 USA
[3] Univ Florida, Global Food Syst Inst, Food & Resource Econ Dept, 185 Frazier Rogers, Gainesville, FL 32611 USA