Researchers examined the effects of personal canvassing, phone calls, and direct mail on voter turnout shortly before the 1998 general election in the US city of New Haven. Personal canvassing had a far greater influence on voter participation than three pieces of professionally crafted mail delivered within two weeks of Election Day. Calls from professional phone banks were even less effective than direct mail at increasing voter turnout.

Researchers evaluated the impact of mailings that informed people with a record of felony conviction of their eligibility to vote on political participation. The mailing increased political participation, particularly among individuals that were active voters prior to incarceration.

Researchers present results from six randomized control trials of an integrated approach to improve livelihoods among the very poor. The impact on the poor households lasted at least a year after all implementation ended.

Kenya, East Africa's largest economy, is struggling with an ageing energy infrastructure and low connectivity to the power grid. William Jack and affiliate Tavneet Suri (MIT) study the impact of off-grid solar power on small retailers in Nairobi.

In India, researchers conducted a randomized evaluation to test how the provision of rainfall index insurance affected farmer production decisions, focusing on the decision to grow cash crops. They found that providing insurance led farmers to shift production towards higher-risk, higher-return cash crops.

Researchers conducted a randomized evaluation to test the impact of offering interest-paying mobile money saving accounts to farmers, and in some cases farmers’ friends, on their financial behavior such as agricultural investment. Providing farmers access to interest-bearing mobile savings accounts increased both the amount of money they saved using these accounts and the likelihood they invested in fertilizer, while providing farmer’s closest farming friends the same incentivized mobile money accounts did not increase savings.

International remittances are an important financial tool for many developing countries, and many organizations offer financial products or financial education services to help families manage the remittances they receive. Researchers provided families with financial products and financial education in the Philippines to test whether the two services influenced each other.

Fertilizer use has been promoted to boost agricultural productivity and increase farmers’ yields and income. Researchers conducted a randomized evaluation among rice farmers in Bangladesh to evaluate the impact of providing leaf color charts and basic training on the quantity and timing of fertilizer use and crop yields. Fertilizer use declined while yield moderately increased for farmers.