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Researchers evaluated the impact of creating schools offering four years of primary education, in lieu of the government, on early grade reading and math skills in rural Guinea Bissau. The intervention led to substantial improvements in literacy and numeracy.

Researchers conducted a randomized evaluation to test whether a performance-based repayment contract could outperform conventional microcredit contracts, or fixed-payment loans, in improving business outcomes and welfare for micro-distributors in Kenya. Micro-distributors who received flexible...

Researchers tested whether an informative letter campaign could reduce inappropriate prescribing of controlled substances in Medicare Part D. Letters had no detectable effect on prescribing. In ongoing work, researchers are testing alternative versions of letters.

Researchers conducted a randomized evaluation to test whether giving vocational trainees richer information about potential jobs improved their employment outcomes. Researchers provide suggestive evidence that with the information, trainees made better decisions on whether to continue the training...

In the United States, many people who are eligible for social and economic benefits do not claim those benefits. Researchers partnered with the U.S. Internal Revenue Service (IRS) to test the effectiveness of different messages to taxpayers designed to encourage them to claim certain tax benefits.

In partnership with the Government of Tamil Nadu, researchers evaluated the impact of incentivizing and monitoring walking on exercise and health. Incentives increased walking and improved health, as measured by risk factors for diabetes and by mental health.