C93, I20, I28, O15
C93, D9, I31, J15, O12
Q53, D10, C93
C93 Field Experiments; I21 Analysis of Education; I22 Educational Finance; I25 Education and Economic Development
Q16, C93, D91
Q12, Q16, O33, D13, C93
I21 I22 I24 I28 H52 J45, F22
C91, C92, D02, D63, D90
G510; G530; I380; D12; O12; C93
J64, C93, D47