D91, I15, I25, O12, O15

K42; I25; J24; O54

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

I21, C93, Z13, D85, J15, D90

J13, I21, I25, J16, I38

A23, C93, J24, O31, L86, I31

I20, I21, I25, I28, C93

and Private Information), L86 (Information Goods and Services, Internet Content)

J24, D83, D91, I25, I26

J24, J13, I21, I25