[1] West Virginia Univ, Div Resource Econ & Management, Morgantown, WV USA
[2] Mississippi State Univ, Dept Agr Econ, Starkville, MS USA
[3] Progress Insurance, Mayfield Village, OH USA
[4] Mississippi State Univ, Dept Agr Econ, 314 Lloyd Ricks Watson Bldg ,Box 5187, Mississippi State, MS 39762 USA