C90, D81, D91, G11, I31
O12, O14, M31, L26
O12; O16; G52; H53
(Technological Change: Choices and Consequences; Diffusion Processes), D91 (Micro-Based Behavioral
L83, Z31, D91, D12, D35
C93, I21, I25, J13, O12, O15
C91, D91, Z13
J71, D91, C90
O12, O13, O15, Q01
O15, O12, I15, J13, J24