I15, I12, O12, C93
I25: Education and Economic Development, C93: Field Experiments, O33: Technological Change. Diffusion and Adoption, O55: Africa
I22, I28, O12, H52
I11, O33, D83
A22 C93 I14 I24 J24 O33
H26, D91, I25, O12, C93
O12; O13; Q56
C93, J23, J24, M51, O33
I21 — Analysis of Education O33 — Technological Change: Choices and Consequences; Diffusion
C91, D03, O33