Researchers conducted a randomized evaluation to evaluate the impact of computer-assisted learning (CAL) on student test scores. The CAL program improved students’ math and language test scores, but increasing the time students spent on CAL did not lead to additional gains.

Researchers conducted a randomized evaluation to test whether encouraging entrepreneurs to raise their aspirations helped them improve their financial decisions and outcomes. The aspirations training led individuals to set higher savings goals, but most participants failed to achieve their goals.

Researchers conducted a randomized evaluation to test the impact of increased access to transportation and assistance with interview scheduling on women’s employment.

Researchers evaluated the impact of financial incentives, public health video messages, and access to a vaccine scheduling link on Covid-19 vaccination intentions and vaccine take-up in the United States. None of the interventions led to increases in vaccine take-up after thirty days. In a subsequent study, researchers found that personal reminder messages led to increases in booster vaccination rates while monetary incentives had no additional impact.

By running a Facebook public health campaign, researchers found that social media messaging from doctors and nurses reduced holiday travel and subsequent Covid-19 infection rates. This suggests that social media campaigns may be an impactful and cost-effective way to slow the spread of Covid-19 and enact behavior change.

Diarrhea is a leading cause of death in children under the age of 5, but adding small amounts of chlorine into water can treat water and prevent a large number of these deaths. Providing free dispensers for chlorine to treat water reduced under-five mortality. Children living in villages with dilute chlorine solution dispensers were 63 percent less likely to die relative to the comparison group.

Researchers partnered with bKash, one of the leading mobile money providers in Bangladesh, to evaluate the impact of targeted training programs on mobile banking uptake among migrant households. Training increased migrants’ and their families’ adoption of mobile banking, with women adopting the technology at similar rates to men, shrinking the gender gap.

In Colombia, researchers are evaluating the economic impact of providing stimulus loans to SMEs, distributed via the government’s COVID-19 relief program (“Unidos por Colombia”), on SME survival, profits, and employment.

Researchers conducted a randomized intervention to measure the impact of financial incentives for reaching daily step goals on physical activity and depression risk during the Covid-19 pandemic, to better understand the association between physical activity and mental health. While program participants significantly increased their daily steps relative to the comparison group, this change in physical activity did not lead to improvement in their mental well-being.

Re searchers used a randomized evaluation to measure the impact of providing mobile calling credits to low-income adults on well-being outcomes in Ghana. Overall, the mobile credit intervention increased the ability for individuals to meet unexpected communication needs, particularly when delivered in installments, leading to meaningful improvements in mental health and modest decreases to domestic violence.

Researchers randomly provided more or less cash to garment-making firm owners in Ghana before a bargaining game to evaluate the impact of endowment on the negotiated sale price of a good. Owners of garment-making microenterprises with lower household liquidity agreed to lower sale prices during the bargaining process, suggesting that the prior wealth of microentrepreneurs who participate in bargaining may impact how much they are able to earn.

The researcher evaluated the impact of a sexual harassment training on the incidence of sexual harassment, opposite sex relationships, and attitudes and beliefs towards sexual harassment in India. Overall, the training reduced extreme forms of sexual harassment in the short run and intermediate forms of harassment in the long run, likely by changing men’s beliefs about others' attitudes to sexual harassment. The training also reduced opposite sex romantic relationships between classmates.

Across six randomized evaluations, researchers studied the impact of low-cost, low-touch informational interventions, or “nudges,” on take-up of the federal and state Earned Income Tax Credit (EITC) in California. None of the interventions had an impact on EITC take-up, suggesting that information alone may be insufficient to overcome administrative burdens.

In Ghana, researchers evaluated the impact of providing vendors and consumers with information on official mobile money charges and options for recourse for consumers to report being overcharged. The program led to a decrease in misconduct, which in turn facilitated an increase in market activity, firm sales revenue, and consumer welfare.

The researcher conducted a pilot randomized evaluation to test the feasibility of a regular community accountability meeting program and a politician health leadership program, as well as the feasibility of associated data collection activities. Both interventions realized considerable stakeholder participation and engagement, providing a foundation on which to conduct a larger randomized evaluation in the future around the impact of these interventions on health service delivery and health outcomes.