Institution: | (1) Institute of Mathematical Economics, University of Bielefeld, P.O. Box 100131, 33501 Bielefeld, Germany (e-mail: chaake@wiwi.uni-bielefeld.de, mraith@wiwi.uni-bielefeld.de), DE;(2) Department of Economics, University of Magdeburg, P.O. Box 4120, 39016 Magdeburg, Germany (e-mail: raith@ww.uni-magdeburg.de), DE;(3) Department of Mathematics, Harvey Mudd College, Claremont, CA 91711, USA (e-mail: su@math.hmc.edu), US |