1. Orazio P. Attanasio is Jeremy Bentham Professor of Economics, University College London, London, United Kingdom, and Research Fellow, Institute for Fiscal Studies, both in London, United Kingdom.
2. Research Associates, National Bureau of Economic Research, Cambridge, Massachusetts, and also Research Fellows, Centre for Economic Policy Research (CEPR), London, United Kingdom.
3. Luigi Pistaferri is Professor of Economics and Ralph Landau Senior Fellow, Stanford Institute for Economic Policy Research (SIEPR), both at Stanford University, Stanford, California. Research Associates, National Bureau of Economic Research, Cambridge, Massachusetts, and also Research Fellows, Centre for Economic Policy Research (CEPR), London, United Kingdom.