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In a series of evaluations, researchers took advantage of a lottery that gave low-income uninsured adults the chance to apply for Medicaid in the United States to examine the impact of health insurance on these outcomes over the first two years.

Researchers conducted a randomized evaluation to test the impact of paying workers on a weekly basis or in one lump sum, as well as of receiving payments in contexts with greater temptation to spend, on their spending and investment decisions. Workers assigned to receive lump-sum wages were more...

Researchers introduced text message reminders to evaluate their effect on Kenyan patients taking their antiretrovirals consistently and not skipping doses. Patients who received weekly text messages were more likely to take their medicine 90 percent of the time and were less likely to skip doses for...

Researchers evaluated the impact of a farmer-to-farmer training program on Ugandan farmers’ knowledge and use of improved dairy farming practices, as well as dairy production and revenues. Overall, the farmer-to-farmer training program improved farmers’ knowledge, productivity and revenues.

Researchers conducted a randomized evaluation to test the impact of two different performance-based incentives on students’ test scores, motivation, and behavior in Malawi. They find that tournament-style incentives that rewarded the top performers among a large group lowered test scores and student...