1. Center for Retirement Research, Boston College, Hovey House, 140 Commonwealth Avenue, Chestnut Hill, MA 02467, USA
2. Department of Economics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA 02467, USA
3. CPB Netherlands Bureau for Economic Policy Analysis, Bezuidenhoutseweg 30, 2594 AV Den Haag, The Netherlands
4. Institute of Labor Economics (IZA), Schaumburg-Lippe-Strasse 5-9, 53113 Bonn, Germany