O12, L25, L15, O14, D12
J13, J16, J22, D91
and the Enforcement of Law), O33 (Technological Change: Choices and Consequences; Diffusion Processes), D12 (Consumer Economics: Household Analysis)
C93, D83, J16, L26, O12
J22, J16, J38, D83
F22, J61, O15, C93, O12
J16, I29, C93
J16, J24, O33
G4, G53, C9, I21
D13, I2, J13, J16, J22