First Author:   Julien Daubanes CER-ETH at Swiss Federal Institute of Technology Zürich and LERNA at Toulouse School of Economics jdaubanes@ethz.ch   CER-ETH, Center of Economic Research at ETH Zürich, ZUE F 14, Zürichbergstrasse 18 Zürich, 8092, Switzerland   +41 44 632 24 27(Phone) +41 44 632 24 27(Fax) http://www.cer.ethz.ch/resec/people/juliend