Achim Goerres, PhD (LSE), is Professor of Empirical Political Science at the Department of Political Science and the Interdisciplinary Centre for Integration and Migration Research at the University of Duisburg-Essen, Germany. He specialises in the comparative study of individuals and politics in advanced industrial democracies with a focus on issues of population ageing and immigration. Pieter Vanhuysse, PhD (LSE), is Professor of Politics and Public Policy at the Department of Political Science and the Danish Centre for Welfare Studies at the University of Southern Denmark, and Senior Fellow of Social Sciences at the Danish Institute for Advanced Study, Denmark. He has published widely in political sociology and political economy, focusing on welfare states, public policies, population change, and intergenerational transfers.