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Search our database of 924 randomized evaluations conducted by our affiliates in 81 countries. To browse summaries of key policy recommendations from a subset of these evaluations, visit the Policy Publications tab.

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Environment & Energy

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

Can encouraging low-income households to participate in a subsidized weatherization program help increase energy efficiency?

Environment & Energy

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...

Agriculture, Environment & Energy, 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.

Environment & Energy

The Lightbulb Paradox: Consumer Behavior and Public Policy in the U.S. Electricity Market

Hunt Allcott , Dmitry Taubinsky

Energy-efficient technologies, such as compact fluorescent lightbulbs (CFLs), have the potential to save consumers money, but their adoption remains low. Researchers evaluated the impact of information and price on demand for CFLs in two contexts: an online survey platform and a typical retail setting. Information and subsidies increased consumers’ willingness to purchase CFLs. Researchers...

Man adjusts thermostat

Environment & Energy

Opower: Evaluating the Impact of Home Energy Reports on Energy Conservation in the United States

Hunt Allcott , Todd Rogers

Researchers studied the short- and long-run effects of these reports on electricity use and found that reports reduced energy consumption by about 2 percent across twelve utilities.

Environment & Energy

The Impact of Real-Time Electricity Pricing in the United States

During periods of high electricity use that strain the grid, electricity customers do not have any reason to conserve because they pay a fixed price per kilowatt hour of power. In this study, the researcher evaluated the impact on electricity usage of a real-time pricing scheme, which charges households different prices throughout the day based on fluctuating wholesale costs. Households charged...