1. Swedish Institute for Social Research, Stockholm University, Stockholm 106 91, Sweden
2. Department of Finance, Stockholm School of Economics, Stockholm 106 91, Sweden
3. Department of Public Health Sciences, Stockholm University, Stockholm 106 91, Sweden
4. Aging Research Center, Karolinska Institutet, Stockholm 171 77, Sweden
5. Department of Economics, Stockholm University, Stockholm 106 91, Sweden
6. Institute for International Economic Studies, Stockholm University, Stockholm 106 91, Sweden
7. Suntory and Toyota International Centres for Economics and Related Disciplines, London School of Economics, London WC2A 2AE, United Kingdom