First Author:   David A. Hennessy Iowa State University hennessy@iastate.edu   578C Heady Hall, Department of Economics and CARD Ames, 50011-1070, USA   515-294-6171(Phone) 515-294-6171(Fax) http://www.econ.iastate.edu/faculty/hennessy/ Second Author: Harvey E. Lapan Iowa State University hlapan@iastate.edu   283 Heady Hall, Department of Economics Ames, 50011-1070, USA   515-294-5917(Phone) 515-294-0221(Fax) http://www.econ.iastate.edu/faculty/lapan/