Researchers randomly evaluated the effects of a decentralized extension program and an additional video-based information campaign on farmers’ adoption of a package of integrated soil fertility management (ISFM) technologies as well as individual practices in Ethiopia. They found that both in-person extension services and extension services combined with a video campaign increased the adoption of the package and some practices of ISFM. This increase was driven by improvements in awareness and knowledge of practices.

Citizen participation in local civic affairs and in decision-making processes around village resources can be a way to align policies with local preferences, hold politicians accountable, and improve public service delivery. In rural Western Kenya, researchers are partnering with GiveDirectly to evaluate the impact of unconditional cash transfers on civic engagement and community participation.

Researchers conducted a randomized evaluation to test the impact of two different types of business training—formal business classes and mentorship from a successful entrepreneur in the same industry—on female entrepreneurs’ profits and use of new business practices in Kenya. They found that inexperienced female microenterprise owners benefited from mentorship, leading to increased short-term profits, though these effects faded after mentorship ended. Meanwhile, despite observing changes in business practices, they found that the traditional classroom training had no effect on profits.

Researchers are conducting an evaluation of the Government of Kenya’s G-United youth volunteer program to test the effect of randomly placing students in locations they prefer on the retention of volunteers in the program, their job performance, and their employment outcomes after the program.

In India, researchers evaluated the impact of the first emissions trading scheme for particulate matter on air quality, industry compliance costs, and industry profits. Compliance with the market was high, and participating firms substantially reduced their particulate matter emissions without large increases in abatement costs, suggesting that the emissions trading scheme was a cost-effective pollution reduction strategy

Researchers tested the effect of an inventory credit program that provided storage facilities and loans on palm oil farmers’ agricultural activities in Sierra Leone. Take-up and use of the storage and loans was low, and there was no impact on total storage or timing of sales.

This study examined the impact of an administrative simplification and a series of behavioral nudges (all via letters sent by mail) on enrollment in subsidized health insurance plans. The administrative simplification, which provided a streamlined path to enrollment, had the largest effect on enrollment, as compared to personalized and generic reminder letters.

Researchers partnered with the Colombian Family Welfare Agency to evaluate how providing enhanced curriculum guidelines and larger nutritional supplements for the Family, Women, and Infancy Program impacted child development. Compared to children receiving the traditional FAMI program, the enhanced FAMI intervention led to significant improvements in the quality of children’s home environment and their cognitive development, particularly for poorer children. There was no significant impact on socio-emotional development.

In partnership with the Polish Tax Office, researchers conducted a nation-wide randomized evaluation to test the impact of sending tax enforcement letters with behavioral messages on tax compliance among delinquent taxpayers. The results indicate that behavioral letters significantly improved tax compliance relative to the status quo letter, and sending letters by regular mail (the cheaper option) was just as effective as sending via registered mail.

Researchers evaluated the learning impacts of using AI systems to score and comment on essays written for Brazil’s national post-secondary admission exam. In schools where AI technology was introduced, teachers were able to provide more frequent individualized feedback to students, and students’ essay scores improved as a result.