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Search our database of 899 randomized evaluations conducted by our affiliates in 80 countries. To browse summaries of key policy recommendations from a subset of these evaluations, visit the Policy Publications tab.

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Two women sit in front of mud stove

Environment & Energy, Health

Cooking Stoves, Indoor Air Pollution, and Respiratory Health in India

Improved cooking stoves may be a way to reduce exposure to indoor air pollution, improve health, and decrease greenhouse gas emissions. This is largely supported by observational field studies and laboratory experiments. This study tested the impact of a commonly used improved stove that had been shown to reduce indoor air pollution and require less fuel in laboratory tests. While researchers...

Boy watching water pour out of a concrete-encased spring.

Environment & Energy, Health

Cleaning Springs in Kenya

Edward Miguel, Michael Kremer , Alix Zwane, Jessica Leino

Protecting water sources from contamination reduces the amount of diarrhea-causing bacteria in drinking water in Kenya.

Environment & Energy, Finance, Health

CARES Commitment Savings for Smoking Cessation in the Philippines

Dean Karlan, Jonathan Zinman , Xavier Giné

Researchers evaluated the impact of a voluntary commitment savings program that allowed individuals to deposit a self-selected amount of their own money that would be forfeited if they did not quit smoking within six months. Results suggested that individuals who were offered the program were much more likely to quit smoking.

Environment & Energy, Political Economy & Governance

Improving Third-Party Audits and Regulatory Compliance in India

Changing the market for environmental audits to incentivize accurate reporting in Gujarat, India made auditors more likely to report the truth about industrial plants’ pollution levels and, in response, industrial plants polluted less.

Environment & Energy, Health

Demand for Nontraditional Cookstoves in Bangladesh

Grant Miller, Mushfiq Mobarak , Puneet Dwivedi, Robert Bailis, Lynn Hildemann

In Bangladesh, researchers evaluated how varying husband-wife dynamics, information, and prices could affect purchases of widely available “improved” stoves, which substantially reduce indoor air pollution. They found that women have stronger preferences for improved stoves than their husbands, but lack the authority to make purchasing decisions.

Agriculture, Environment & Energy

Community Based Rangeland Management in Namibia

Dean Karlan , Julian Jamison, Tim O'Connor

In parts of southern Africa, environmental pressure on the land from over-grazing has contributed to land and water shortages and made communities more vulnerable to drought. In Namibia, researchers are measuring the impact of a community-based natural resource management program on livestock assets, income, social cohesion and land quality.