In Ethiopia, researchers tested whether linking microcredit and family planning services could increase contraceptive use more than either program in isolation. Neither the linked program nor the isolated programs had any detectable impact on contraceptive awareness, use, or intention to use.

Researchers analyzed the introduction of microcredit programs in parts of rural Ethiopia to evaluate the effect of improved credit access on economic and social outcomes. They found that introducing microcredit programs increased the frequency of borrowing and amount borrowed by rural households in Ethiopia, but found mixed evidence that microcredit improved economic well-being or socio-economic indicators.

Researchers conducted an evaluation to test the impact of introducing a second school-based nutrition program, and monitoring these two programs, on child nutrition and program implementation. Results showed that high intensity monitoring improved the implementation of the government’s iron and folic acid supplementation program and, in turn, improved child health. The introduction of the new micronutrient mix intervention crowded out implementation of the government’s iron and folic acid supplementation program, leading to no net change in child health.

In Malawi, researchers evaluated the impact of a vocational training program on youth's skills, economic outcomes, and well-being. While the training generally improved skills and well-being, it had more positive effects for men compared to women, and had no impact on labor market outcomes in the short run for either gender.

Researchers contacted registered voters in a New England town by telephone and asked a portion of these voters to predict whether or not they would vote. This allowed researchers to use a randomized evaluation to measure the impact of making a prediction about future voting behavior on actual voting behavior. The study found no significant effect of prediction-making on voter turnout.

Researchers randomly provided postage-paid envelopes to a subset of permanent absentee voters in San Mateo County, California in order to evaluate its impact on voter turnout. The provision of prepaid postage resulted in no net change in voter turnout because it simultaneously decreased the number of votes cast by mail and increased the number of votes cast in person.

Researchers tested the impact of non-partisan Spanish-language radio campaigns on Latinx voter turnout in the November 2006 congressional elections. These radio advertisements significantly increased Latinx voting rates.

Researchers examined the effect of radio advertisements on electoral competition through a randomized evaluation and found that radio advertisements that stated the names of both incumbents and challengers, reminded listeners about the date of the upcoming election, and encouraged them to vote increased competitiveness in municipal elections in the United States.

Researchers introduced a Voluntary HIV Counseling and Testing (VCT) program to young females in Malawi to determine whether the program affects risky sexual behavior and school performance. They found no overall effect of VCT on risk of sexually transmitted infections or achievement test scores. However, those who tested positive for HIV had increased rates of other sexually transmitted infections, and those who were surprised by negative HIV test results experienced a significant improvement in test scores.

Researchers used a randomized evaluation to measure the impact of introducing credit scores on lending to small enterprises in Colombia. The adoption of credit scores increased productivity in the loan approval process and improved credit allocation.