D83, J12, C93, N36
C93 - Field Experiments; H52 - Government Expenditures and Education; I21 - Analysis of Education
J16, J24, C93, J33
D03, D12, D91, L94, O13, Q41, C93, H42, H53
J71, O33, J16, D91
C91, D91
C92, D85, D91, Z13.
C91, D90, D91
J71; D91; C90;
D6, D63, D64, D9, D91, D3, D31, H53, I38