The American Economic Association's registry for randomized controlled trials
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976 Trials Found
C90, D64, L31
C90, D81, D91, G11, I31
C92; D31; D63
C90 C91 D63 D90 H23
C91, D91, Z13
J71, D91, C90
C91, C92, D12, D90
D63, D72, D83, D91, H23
C91; C92; D83;G12
P48, Q58, H23, Q54