Search our database of 1,200+ summaries of randomized evaluations conducted by our affiliates in 100 countries. To browse key policy recommendations from a subset of these evaluations, visit the Policy Publications tab above.

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

Cleaning Springs in Kenya

Michael Kremer
Jessica Leino
Edward Miguel
Alix Zwane
Informal settlement in Nairobi, Kenya

Demand for Sanitation in Kenyan Urban Slums

Sebastian Galiani
Paul Gertler
In slums near Nairobi, Kenya, researchers are testing how subsidizing the cost of connecting to the sewer system and providing information about the health benefits of improved sanitation affects the number of landlords who connect to the sewer system.
A boy washes his hands while other students are waiting in line for their turn

The Impact of Sanitation and Hand-Washing Promotion Campaigns on Child Health in Tanzania

Bertha Briceno
Aidan Coville
Paul Gertler
Sebastian Martinez
Researchers conducted a randomized evaluation to measure the impact of sanitation and hand-washing promotion campaigns, alone and in combination, on household knowledge, behavior, and child health (diarrhea prevalence, stunting, wasting, and anemia). While the program improved hygiene and sanitation...
A group of women gather around a roadside tap, filling their containers with water.

Delivering Clean Water to Households in India

Fiona Burlig
Amir Jina
Anant Sudarshan
More than two billion people around the world lack access to clean drinking water, and current approaches to increasing access have fallen short. Researchers conducted a randomized evaluation to test the impact of delivering clean water directly to households on the valuation of clean water, and...
Water tanks attached to houses in a large field

Demand for Rainwater Harvesting Devices in Uganda

Mushfiq Mobarak
In Uganda, researchers studied the demand for rainwater storage devices, the effectiveness of various marketing strategies in promoting them, and their impact on indicators such as school attendance and women’s participation in the labor market.
A woman carries her child

Willingness and Ability to Pay for the Kosim Clean Water Filter in Ghana

James Berry
Greg Fischer
Raymond Guiteras
Researchers in Ghana are attempting to measure households' demand for simple ceramic water filters by offering the filter at different price levels through door-to-door sales. They will also explore whether different household characteristics, such as education, income, and health, affect a...
Water point in Malawi

The Roles of Water Treatment Subsidies and Community Health Workers in Improving Child Health and Chlorine Usage in Malawi

Researchers partnered with Partners in Health (PIH) to conduct a randomized evaluation to test the impact of monthly coupons and different CHW delivery methods on chlorine usage and child health outcomes in Southern Malawi. They find that the coupon program had stronger impacts on both outcomes and...