Mark R. Johnson A. B. Freeman School/Tulane University   7 McAlister Drive Tulane University New Orleans, LA 70118 USA   mjohnso@tulane.edu   markrjohnson.net   Biographical Sketch: Check this web site for Biographical data http://business.tulane.edu/faculty/facinfo.php?RecordID=mjohnso@tulane.edu   Primary Research Focus: Choice, Complexity, Mechanism Design   JEL Areas: C6 : Mathematical Methods and Programming: General D : Microeconomics