The American Economic Association's registry for randomized controlled trials
Select the trial sections you'd like to search within...
255 Trials Found
C93, D90, I28, J13
I10, I12, D90
I20, I21
C90, J01, D90
J13 Early childhood stimulation; other codes: I20, I25, I30, I38
D04, D80, D90, H20, H30, H50
D90, D91, D80, D84
C83, C90, D90, D91, M31, O33
I20; I31
C91, D90