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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.

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.

In partnership with the Government of Indonesia, researchers conducted a randomized evaluation to compare the efficacy of vouchers versus in-kind transfers in reducing poverty and improving program delivery. The reform led to an increase in assistance received by eligible households, due to improved...

Researchers conducted a randomized evaluation of Check & Connect (C&C), a school-based mentoring program, to evaluate its impact on school attendance and academic outcomes. For students who began the program in grades 5-7, the program decreased student absences and caused participating students to...

Researchers conducted a randomized evaluation of cricket teams in rural India to identify whether team composition could improve intergroup harmony. Collaborative contact between cricket players of different castes reduced prejudice toward members of lower castes and increased cross-caste...

In rural Uganda, researchers evaluated whether videos encouraging communities to speak out against violence against women (VAW) could change behavior, attitudes, and norms. Women exposed to the videos were more willing to report VAW to authorities. More broadly, women in villages where the videos...