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In India, researchers measured the impact of providing vouchers to attend private schools on student learning. Students who won vouchers had test scores that were 0.13 standard deviations higher across all subjects.

In low- to middle-income countries around the world, nearly one billion people lived in urban informal settlements as of 2018. Rapid urbanization in most large African cities has led to both more people and a higher proportion of people living in informal settlements over time. Researchers conducted...

Researchers evaluated the impact of different approaches designed to increase latrine coverage on actual latrine coverage, investment in hygienic latrines, and the prevalence of open defecation.