Irenaeus Wolff University of Konstanz, Thurgau Institute of Economics (TWI)   Hauptstrasse 90 Hauptstrasse 90 Kreuzlingen, 8280 Switzerland   wolff@twi-kreuzlingen.ch   http://www.wiwi.uni-konstanz.de/fischbacher/home/staff/dr-irenaeus-wolff/           JEL Areas: C9 : Design of Experiments: General H4 : Publicly Provided Goods: General