The American Economic Association's registry for randomized controlled trials
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983 Trials Found
Q57,D83, H83, J48
C92, D74
D83, D63, D31
D31, D63, D90, and D92
J31, J5, D83, D84, C93
I18, J16, D83, K42
C78, C91, D63
D47, D81, D82, D83
C91; D83; D84; D91
C91, D31, D63