I12, I18
D91, I12
C93, D91, I12
D91, I12
D22 Firm Behavior: Empirical Analysis, Q4 Energy, Q5 Environmental Economics
I25 Education and Economic Development; I15 Health and Economic Development
D12, D83,D64, I12,,Q13,Q18
D83, D91, I12, I18.
I12
I12, D83, D91