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Search our database of 998 randomized evaluations conducted by our affiliates in 84 countries. To browse summaries of key policy recommendations from a subset of these evaluations, visit the Policy Publications tab.

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Agriculture, Environment, Energy, & Climate Change

Paying for Environmental Services: An Experimental Study in Bolivia

In Bolivia, researchers are evaluating the effect of information provision and financial incentives on the adoption of environmentally friendly cattle management practices.

Environment, Energy, & Climate Change

Information Campaign to Reduce Plastic Bag Consumption in Supermarkets in Mexico

Dean Karlan, Jonathan Zinman , Jeremy Shapiro, Alberto Chong

More than 500 billion plastic bags are used every year, and in many cases they are only used once before becoming landfill waste or litter. Many developed and developing countries have adopted regulations to ban non-degradable bags or fees to reduce demand. This evaluation measured the impact of different in-store information campaigns on the consumption of plastic shopping bags and the sale of...

Man in jumpsuit puts recycling into truck

Environment, Energy, & Climate Change, Political Economy & Governance

Recycling Program Take-up and Participation in Northern Peru

Dean Karlan, Jonathan Zinman , Jeremy Shapiro, Alberto Chong

Researchers examined the effect of a series of informational messages on participation in a recycling program in Peru. They found that none of the messages had any effect on recycling.

Agriculture, Environment, Energy, & Climate Change, Finance

Household Risk Strategies and Conditional Cash Transfers in Nicaragua

Karen Macours , Patrick Premand, Renos Vakis

Providing households with vocational training or capital grants to generate non-agricultural income helps improve consumption and resilience to weather shocks.

A sloping landscape in western Uganda

Environment, Energy, & Climate Change, Political Economy & Governance

Testing the Effectiveness of Payments for Ecosystem Services to Enhance Conservation in Uganda

Seema Jayachandran , Charlotte Stanton, Joost de Laat, Eric Lambin

Curbing deforestation in developing countries may be a cost-effective way to reduce carbon emissions and address climate change.

Environment, Energy, & Climate Change, Health, Political Economy & Governance

Community Participation in Arsenic Mitigation Efforts in Bangladesh

Alessandro Tarozzi , Christine Marie George, Alexander Geen, Vesna Slavkovich, Ashit Sinha, Diane Levy, Tariqul Islam, Kazi Ahmed, Joyce Moon-Howard, Xinhua Liu, Pam Factor-Litvak, Joseph Graziano

The natural occurrence of arsenic in groundwater is an important public health concern in several countries. In Bangladesh, millions of people are estimated to be at risk of drinking water containing unsafe levels of arsenic.