The American Economic Association's registry for randomized controlled trials
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35 Trials Found
Q41, I30, C93
J01, H00, R38, I30
C93, D91, G50, I30
C91, C93, D03, I30; O12
H41, H760, H430, I30, K420, R23
I30
O120, D90, I30
J24, I19, I30, I31
J13 Early childhood stimulation; other codes: I20, I25, I30, I38