The American Economic Association's registry for randomized controlled trials
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937 Trials Found
C93, D83, D91, F51, G11
C93, D72, D73, D91, H23
C93, J16, J22, J23, J71, D83, O12
C93, D83, I22, I24
C93, I12, I18, D83
C91, C93, D12, D83, I12
C93, D72, D91
C92; D43; D83.
J12 , J13 , D83 , D84 , C93
J16, J31, D83