In the United States, researchers evaluated the social welfare impacts of one very popular nudge to decrease energy consumption—Home Energy Reports (HERs). While they found that the HERs increased social welfare overall, these gains were far less than those reported by previous evaluations that did not account for many of the non-energy costs incurred by nudge recipients.

In partnership with a mobile network operator launching a new phone-based savings account, researchers evaluated the role of defaults and financial incentives on savings decisions. Two months after the launch of the phone-based savings account, the company’s employees randomly assigned a default contribution rate of 5 percent were 40 percentage points more likely to contribute to the account than employees assigned a default contribution rate of 0 percent.

Researchers partnered with a water company in Zambia to evaluate whether improved information and incentives can help households manage their water usage. They found that targeting incentives to higher household water consumers might be an effective way to reduce water consumption.

Working with the Rwandan Education Board, Educate!, and Akazi Kanoze Access, researchers are examining the impact of a program that trains teachers in Rwanda’s revised secondary school entrepreneurship curriculum on student academic, economic, and labor market outcomes.

Technology adoption often requires investments over time. As farmers realize new information about the costs and benefits of investments, they may abandon the newly adopted technology shortly after. Researchers partnered with the non-governmental organization Shared Value Africa and Dunavant Cotton Ltd to investigate the effects of subsidies and follow-through rewards on the adoption of an agroforestry tree species.

Researchers are using a randomized evaluation in Mexico to study the incentives media stations face when choosing to provide voters with indicators of their incumbent party’s performance in office.

Researchers introduced a price regulation on poultry vaccines in Tanzania to evaluate the impact of reducing service providers’ discretion over prices on the number of recipients served, prices charged, and the overall welfare of beneficiaries. The price-cap reduced the average price of vaccinations, thereby making the product more accessible for smaller-scale and lower-income farmers. However, without discretion to raise prices, providers reduced coverage to more remote areas. On net, introducing price-caps reduced welfare.

The researcher used a randomized evaluation in Papua New Guinea to study the impact of the Community Auxiliary Police (CAP), a program that devolves policing powers to carefully selected community members. Results suggest increased state presence may have widened the gap between men and women’s preferences for state versus customary authorities but did not reduce crime.

During the 2016 Ugandan elections, researchers conducted a randomized evaluation of an anti-vote-buying campaign to study voter behavior and electoral outcomes. Overall, the campaign did not reduce the extent of vote buying, but it had substantial effects on electoral outcomes.