I20; I21; I24; C93; O33
J16, J22, D13, O15, C93
I11, I12, I18, D12, D83, C91, C93
G21, M41, O16, G32, D83, C93
JEL: C93, I21, J13
D180, C93, D12, D91, G21, G51
C83, C93, D81, D83, I20, I23
J01, J7, C93
Q54; Q56; O13; I18
Economics: Empirical Analysis C93 — Field Experiments Q56 — Environment and Development
O13 — Economic Development: Agriculture; Natural Resources; Energy; Environment; Other Primary