I21, I29, C93, D03
O33, C93
D22, J15, D83, C93, L86, L25
J46, O17, C93, J31, J61
C92 C78 I20
Q18, L66, D81, C93, D11
C93, D83, I21, I24,
C93, D22, D90, J16, O12
D83, J12, C93, N36
C93 - Field Experiments; H52 - Government Expenditures and Education; I21 - Analysis of Education