I12; I18; D83; C93; D85
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)