| April 2004 until present | Scientific Director of Netspar, Tilburg University, The Netherlands |
| May 2002 until December 2004 | Scientific Director of CentER for Economic Research, Tilburg University, The Netherlands |
| Research Professor at the Research Center for Economic Policy (OCfEB), Erasmus University Rotterdam, The Netherlands |
| April 1998 until April 2002 | Research Professor at the CentER for Economic
Research, Tilburg University, The Netherlands |
| Research Professor at the Research Center for Economic Policy (OCfEB), Erasmus University Rotterdam, The Netherlands |
| September 1995 until April 1998 | Deputy Director, CPB Netherlands Bureau for
Economic Policy Analysis, The Hague, The Netherlands |
| Senior Research Fellow at the CentER for Economic Research, Tilburg University, The
Netherlands |
| Research Professor at the Research Center for Economic Policy (OCfEB), Erasmus
University Rotterdam, The Netherlands |
| May 1992 until September 1995 | Senior Research Fellow at the CentER for
Economic Research, Tilburg University, The Netherlands |
| Research Professor at the Research Center for Economic Policy (OCfEB), Erasmus
University Rotterdam, The Netherlands |
| May 1990 to May 1992 | On leave from the IMF at Ministry of Economic
Affairs, Directorate for General Economic Policy, The Netherlands |
| Economist, Visiting Professor at the Tinbergen Institute, Erasmus University
Rotterdam, The Netherlands |
| February 1985 to May 1990 | International Monetary Fund, Washington, DC, USA - Economist |
| Winter 1984-85 | Erasmus University Rotterdam, The Netherlands - Visiting Scholar at Fiscal Economic Institute |
| Autumn 1983 | University of California, Berkeley, CA, USA - Teaching Assistant in Macroeconomics |
| Spring 1978-Spring 1981 | Erasmus University Rotterdam, The Netherlands - Research Assistant at Econometric Institute |