J24, J3
A22 C93 I14 I24 J24 O33
J13 J24 J18 C93
I21
O15 Economic Development: Human Resources, Human Development, Income Distribution, Migration J61
H26, D91, I25, O12, C93
C93, J23, J24, M51, O33
I21 — Analysis of Education O33 — Technological Change: Choices and Consequences; Diffusion
C90; C91; I21; J15; J16
O15, I24, I25