1. Faculty of History, University of Cambridge , Cambridge, United Kingdom of Great Britain and Northern Ireland
2. Economic, Social and Demographic History, Radboud Universiteit Faculteit der Letteren , Nijmegen, Netherlands
3. Nederlands Interdisciplinair Demografisch Instituut , Den Haag, Netherlands
4. Department of History, Classics and Archaeology, Birkbeck College, University of London , London, United Kingdom of Great Britain and Northern Ireland