I1, I3, H4
D2, J3, H4, M5
H4 H8 O1
C21, C93, D1, D90, D81, H4, I22, I15, I18
H4,L8,C91,
I1, O1, H4
C9, D7, H4
H4 - Publicly Provided Goods, L3 - Nonprofit Organizations and Public Enterprise, D4 - Market Structure, Pricing, and Design
O1, Q1, H4
H4