I25: Education and Economic Development, C93: Field Experiments, O33: Technological Change. Diffusion and Adoption, O55: Africa
I25 D85 L86 O55
O12, O13, O33, O55, Q12. Q16
D72, O55, P16
O13, O33, O55
D22, Q54, O14, O55
D01, D81, O12, O55
D72, O13, O55, P16.
C93, D91, D04, I21, O55
D72, O55, P16