D22, J15, D83, C93, L86, L25
J46, O17, C93, J31, J61
Q18, L66, D81, C93, D11
O15, J16, J24, I38, D74
C93, D83, I21, I24,
J16, J24, M53, O12, O15
C93, D22, D90, J16, O12
D83, J12, C93, N36
C93 - Field Experiments; H52 - Government Expenditures and Education; I21 - Analysis of Education
J16, J24, C93, J33