Wouter den Haan is Professor of Economics at London School of Economics and Political Science, programme director of CEPR, and Co-director of the Centre for Macroeconomics. Professor den Haan graduated cum laude from the MA program at Erasmus University, he received his PhD degree at Carnegie Mellon University in 1991. This dissertation won him the Alexander Henderson Award for excellence in economics. After earning his PhD he became an Assistant Professor at the University of California at San Diego, where he was a Professor from 2001 to 2004. At the beginning of 2003 he moved back to Europe and became a Professor of Economics at London Business School.In 2006 he received a VICI award and became a Professor of Economics at the University of Amsterdam. He has been a Visiting Professor at the University of Rochester and the Wharton School and also a Visiting Scholar at the European Central Bank, the Board of Governors of the Federal Reserve System in Washington DC, and several regional Federal Reserve Banks. His research interests are business cycles, frictions in financial and labour markets, and numerical methods to solve models with a large number of heterogeneous agents.