1. School of Mathematical and Statistical SciencesArizona State University Tempe Arizona
2. Mary Lou Fulton Teachers CollegeArizona State University Tempe Arizona
3. Department of Agricultural Economics and AgribusinessUniversity of Arkansas Fayetteville Arkansas
4. Institute of Applied and Computational MathematicsFoundation for Research and Technology—Hellas Heraklion Greece
5. Department of EconomicsArizona State University Tempe Arizona