I25, O15, O33
I21 (Evaluation of Education), I25 (Education and Economic Development)
i20
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
and the Enforcement of Law), O33 (Technological Change: Choices and Consequences; Diffusion Processes), D12 (Consumer Economics: Household Analysis)
C81, C93, D81