J13 J24 J18 C93
I21
C93, J23, J24, M51, O33
I21 — Analysis of Education O33 — Technological Change: Choices and Consequences; Diffusion
I21 – Analysis of Education: Education and Economic Development I28 – Education: Government Policy I31 – General Welfare, Well-Being
I21, J24, O33
J24
I21, I28, C93, O15
C93, I21, I12, J13, I31
I21 I24 I26