1. Simiao Chen () is head of the Research Unit for Health and Population Economics at the Heidelberg Institute of Global Health, Faculty of Medicine and University Hospital, Heidelberg University, in Germany.
2. Michael Kuhn is head of the Research Group on Population Economics at the Vienna Institute of Demography, Wittgenstein Center, in Austria.
3. Klaus Prettner is a professor of economics in the Institute of Economics, University of Hohenheim, in Stuttgart, Germany.
4. David E. Bloom is a professor of economics and demography in the Department of Global Health and Population, Harvard T. H. Chan School of Public Health, in Boston, Massachusetts.