In collaboration with PRISMA, a Peruvian NGO offering credit through village banks, researchers designed and implemented a new loan product, which required new clients to be sponsored by existing clients, to measure the relative importance of social networks and prices for borrowing in shantytowns near Lima. Results demonstrated that borrowers were more likely to obtain sponsorship from friends. Non-friends were more likely to sponsor higher quality borrowers.

Researchers evaluated a mass school-based deworming program in Western Kenya, and found that deworming substantially improved health and school participation of treated children, as well as of untreated children in both treatment schools and neighboring schools. The program reduced school absenteeism by more than one-quarter, and was far cheaper than alternative ways of boosting school participation.

This study evaluated the impact of a preschool nutrition and health project that targeted anemia in the slums of Delhi, India on child health and school attendance. Results showed the program positively impacted weight-gain and school attendance, particularly for groups with high base-line rates of anemia.

Researchers provided educational flipcharts to 89 randomly selected Kenyan primary schools and evaluated their impact on student learning, comparing retrospective and prospective estimates. In the prospective study, the estimated impact of flipcharts on student test scores was found to be close to zero. In contrast, the retrospective study seriously overestimated the impact of the intervention.

Researchers conducted a randomized evaluation to measure the impact of having a roommate who drank alcohol frequently before college on college students' grade point averages (GPAs). Results show that, while female students' GPAs were not affected by their roommate's drinking prior to college, male students' GPAs were significantly reduced by being assigned to a roommate who drank frequently before college.

Researchers in the United States assessed the impact on college students of having a roommate from a different race. White students assigned to a black roommate were more likely to endorse affirmative action policies than those assigned to a white roommate. Other factors, such as having roommates from high-income or low-income backgrounds, also influenced students' behavior and attitudes towards social issues.

In partnership with International Child Support, researchers designed and evaluated an incentives program that provided salary bonuses to teachers in Kenya based on the performance of their school as a whole on annual district exams. While results show that the incentives program led to an increase in student test scores, researchers believe that this increase was due to improved test-taking strategies and "cramming," rather than an increase in overall knowledge. The program did not have an impact on test scores in the long-run.

Researchers evaluated the impact of a program that provided additional textbooks to primary schools in Kenya on students, teachers, and overall learning. This study found no evidence that textbook provision increased average test scores, or that it reduced either grade repetition or dropout rates.

Researchers examined the effects of subsidized school meals on school participation, educational achievement, and school finance in Western Kenya. The results suggest that the meals program led to improved school participation, as well as higher curriculum test scores, but only in schools where the teacher was relatively experienced prior to the program. The school meals also displaced teaching time and led to larger class sizes.

This study in Kenya found that cost-sharing and health education were not effective alternatives to a total subsidy of deworming drugs.

Researchers tested the influence of the (randomly chosen) rate at which clients were told contributions to their Individual Retirement Arrangements (IRAs) would be matched on the amount contributed to their retirement savings accounts. They found higher matching rates significantly increased IRA participation and contributions.

Researchers evaluated three interventions that addressed the large class sizes and heterogeneity in student preparation in the Kenyan school system. They found that hiring additional local contract teachers helped reduce classroom overcrowding and improved student learning outcomes. The biggest gains came when local school committees were empowered to oversee the recruitment process and to effectively monitor teachers, and when classes were structured to target instruction to students’ initial achievement level.

Researchers analyzed outcomes from a previously conducted randomized evaluation to assess the impact of large primary school management reforms in Madagascar on student test scores, and if impacts varied by type of teacher. Results show that the management reforms did not have any impact on student test scores, regardless of teacher type.