Researchers conducted a randomized evaluation in Nigeria to determine whether a campaign against electoral violence could spread through social networks to affect the perceptions and behaviors not only of the individuals targeted by the campaign but also others to whom they have social ties. The clearest effects of the campaign were on decreasing the perceptions of violence among those with social ties to the targeted individuals, most often through family links.

In Chicago, researchers evaluated an intensive two-on-one math tutoring program for 9th and 10th grade male students in public schools to assess the effectiveness of individualized instruction. Students who were randomly assigned to tutoring scored higher on math exams, earned better grades in math, and were more likely to pass high school classes.

Researchers evaluated whether participating in the law-making process influenced firms’ compliance with regulations in Vietnam. Firms that participated in the drafting of new regulation had more positive views of the government’s regulatory authority, were more likely to allow auditors to examine facilities, and ultimately improved compliance with factory floor regulations.

Researchers evaluated the effects of different medication packaging and messaging on individuals’ adherence to malaria treatment in Uganda. They found that colorful, “high quality” packaging had no effect, while adding low-cost stickers with simple informative messaging to existing packaging improved adherence.

Researchers examined two occasions in which an Argentine Congressional chamber was subject to randomly assigned term lengths as a result of political or constitutional changes. Assignment to a longer term increased overall legislative effort.

Researchers evaluated the impact of providing schools with an unconditional cash grant, a teacher incentive program, or both on student learning. The cash grant had no impact on student learning, while the teacher incentive program had mixed results. However, combining both programs together had an even greater impact on student learning compared to the sum of the effects from each individual component alone.

Researchers used two experiments to identify whether the motive for giving in public can be primarily linked to a desire for prestige (the “image” effect) or a hope that a public gift will influence others (the “signal” effect). They found that a desire to improve social image largely explained why public recognition of contributions to charitable organizations increased individual donations in the United States.