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

D83, C91

C91, C92, H41

C91, D81, D91

D8, D64, C91

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

D8, D64, C91

C91, D14, D15

C91

J15, J16, J20, C91