Search our database of 1121 randomized evaluations conducted by our affiliates in 93 countries. To browse summaries of key policy recommendations from a subset of these evaluations, visit the Policy Publications tab.

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The Impact of an Emissions Trading Scheme on Economic Growth and Air Quality in India

In India, researchers are evaluating the impact of the first emissions trading scheme for particulate matter on air quality, industry compliance costs, and industry profits.

Price Incentives for Groundwater Conservation in India

Nick Hagerty
Ariel Zucker
Researchers partner with a rural development organization to evaluate financial incentives for voluntary groundwater conservation among smallholder farmers in Gujarat, India.

Community Based Rangeland Management in Namibia

In Namibia, researchers measured the impact of a community-based natural resource management program on livestock assets, income, social cohesion, and land quality.

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

Charlotte Stanton
Joost de Laat
Eric Lambin
In Uganda, researchers conducted a randomized evaluation to test the effectiveness of a program in which landowners were paid to not cut forest trees on their property. During the study period, landowners who were offered contracts to conserve forest cleared 4 percent of forested land, compared to 9...

Household Risk Strategies and Conditional Cash Transfers in Nicaragua

Patrick Premand
Renos Vakis
Researchers tested the effect of a basic CCT program, as well as two complementary interventions, on households’ vulnerability to irregular weather patterns. Providing households with vocational training or capital grants to generate non-agricultural income helps improve consumption and resilience...

The impact of payments for ecosystem services on crop burning in India

Researchers are conducting a randomized evaluation to test the impact of a PES program that offers financial rewards to paddy farmers for reducing burning of crop residue (or “stubble”) on stubble burning in Punjab, India.

Environmental inspections for pollution regulation enforcement in China

Douglas Almond
Shuang Zhang
n collaboration with China’s National Environmental Inspection Program, researchers are evaluating the impact of reporting firms’ hourly emissions data to environmental inspectors on the likelihood of firms being inspected, local air pollution, local economic output, and health outcomes.

Reducing Energy Consumption and Greenhouse Gas Emissions through Energy Efficient Retrofits: Evidence from Low-Income Households

Researchers evaluated the impact of a residential energy efficiency program on energy savings and carbon emissions in the United States. They found that energy savings equaled only about half of the upfront cost of the program, which were far less than projected.