research assistance. The support of the World Bank and of the Economic and Social Research
Council (UK) is gratefully …, University of Oxford, Manor Road, Oxford OX1 3UQ. Email:
marcel.fafchamps@economics.ox.ac.uk.
‡
DECRG, The World Bank, 1818 H …, let individuals derive utility V from total consumption
expenditures X and from public amenities A:
V
jk
= V(X
jk
,A
k …