C93 – Field Experiments D91 – Behavioral Economics Q42 – Alternative Energy Sources Q48 – Energy Policy
D91, D84, G41, C93
C93,D14,D91,G41,G51
I21; I23; C93
H55, J26, D83, D84, D14, D91, G53, C93
C93, D63, D64, D91, Z11, I24
C93, I12, I21, I38, J12, J13, J22, J31
J16, J22, D13, O15, C93
C93, H41, H42, O12, Q25
J22; D13; J16; O12; Q56; C93.