1. J. Gaillard (corresponding author), UMR 196 (Université Paris Descartes & IRD), 19 rue Jacob, 75 006 Paris, France.
2. A-M. Gaillard, Freelance social anthropologist, Specialist in International Migration Studies.
3. V.V. Krishna, Professor in Science Policy, Centre for Studies in Science Policy, School of Social Sciences, Jawaharlal Nehru University.