I21 Analysis of Education I26 Returns to Education I28 Education: Government Policy J24 Human
Capital; Skills; Occupational Choice; Labor Productivity O15 Economic Development: Human Resources
; Human Development; Income Distribution; Migration O33: Technological Change: Choices and Consequences • Diffusion Processes
I12; I18; D83; C93; D85
I25, O15, O33
I21 (Evaluation of Education), I25 (Education and Economic Development)
J46, J31, C93
C93, J12, J13
C93, Q48, N75
C93, J12, J13
C93, J13, D13
Products), Q48 (Energy: Government Policy), C93 (Design of Experiments: Field Experiments), L94 (Industry
O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment; Other Primary
and the Enforcement of Law), O33 (Technological Change: Choices and Consequences; Diffusion Processes), D12 (Consumer Economics: Household Analysis)