1. Center for Demographic Research (DEMO), Université Catholique De Louvain (UCL), Louvain-la-Neuve, Belgium
2. French Institute for Demographic Studies, Paris, France
3. Department of Ecology and Evolutionary Biology and the Woodrow Wilson School, Princeton University, Princeton, NJ, USA
4. Bureau Municipal d’Hygiène De La Commune Urbaine d’Antananarivo, Antananarivo, Madagascar