Wulf Gaertner is Professor of Economics at the University of Osnabrück in Germany and Fellow of Wissenschaftskolleg, Berlin. He has held several visiting posts at Tulane University, Harvard University, and the London School of Economics and Political Science, and was the recipient of the Ludwig Lachmann Research Fellowship from the LSE for the period 2006-2008. Professor Gaertner is also one of the managing editors of the journal, Social Choice and Welfare.