[1] Univ Cambridge Trinity Coll, Cambridge CB2 1TQ, England
[2] Univ Delhi, Inst Econ Growth, Delhi 110007, India
[3] Fac Modern Hist, Oxford OX1 4AL, England
[4] Univ Oxford All Souls Coll, Oxford OX1 4AL, England
[5] Univ Amsterdam, NL-1012 DL Amsterdam, Netherlands