Credit constraints are central to development economics theory. However, there is scant direct evidence that supports the existence of such constraints. Traditional tests observe how consumption changes after an unexpected income shock. Such changes can also result from myopic behavior or...

We analyze evidence from 10 at-scale field experiments in four countries on the effect of inquiry- and problem-based pedagogy (IPP) on students' math and science test scores. IPP creates active problem solving opportunities in settings that derive meaning to the child. Students learn by...