I21, I28, C93
C93 – Field Experiments D91 – Behavioral Economics Q42 – Alternative Energy Sources Q48 – Energy Policy
I20; I21; I28
I22, I28, H52, D72, D83
I25, I28, D74, D91, C93
I21, I28, C93, D83
D24, D91, I20, I25, I28
I21, I28, O33, C93
21, I28, C93, D91, J24
I21, O33, I25, I28