First Author:   Danyang Li Georgia State University prcdlx@gmail.com   Georgia State University, Georgia State University, 14 Marietta Street, NW Atlanta, 30303, USA       https://sites.google.com/site/danyangli2012/ Second Author: James C Cox Georgia State University jccox@gsu.edu   Experimental Economics Center, PO Box 3992, Georgia State University Atlanta, 30303-3992, USA   (404) 413-0200(Phone) (404) 413-0195(Fax) http://excen.gsu.edu/jccox/