The American Economic Association's registry for randomized controlled trials
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142 Trials Found
J13 Early childhood stimulation; other codes: I20, I25, I30, I38
C93, D90, I28, J13
C93, D83, I12, J13.
C93, D83, O15, J13.
I00, J13
D1, D13, C9, J13
C93, D83, I12, J13
J13, A20
O10, O15, C93, I26, J13, J16
C93, J13, J24, I21, I25, H11