@techreport{Filmer1998,
author = {Filmer, D. and Pritchett, L.},
title= {Estimating wealth effects without income or expenditure data-or tears: Educational enrolment in India},
year = {1998},
publisher = {The World Bank},
address = {Washington DC},
institution = {World Bank policy Research Working Paper},
number = {No.1994},
}