D83, D91, J16, J29, O53, Z12, Z13

: Underlying Principles), D82 (Asymmetric and Private Information), D83 (Search; Learning; Information

and Knowledge; Communication; Belief; Unawareness), L81 (Retail and Wholesale Trade; e-Commerce), L86 (Information Goods and Services, Internet Content)

O33; D83: O16; L14; O17; L81

M54, O33, J24, D23

I20, I21, I24, I28, D83

D83, C91

D83, D84, G11, G12, G41, G51

J24, L26, C93, O17, I23

D14, D81, D83, G41, G53, O33

C93, Q12, Q13, Q16, D3, O13, O33, Q54, J22, J23