Search our database of 1157 randomized evaluations conducted by our affiliates in 95 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 Mobile Money on the Purchase of Improved Sanitation Services in Senegal

Molly Lipscomb
The proliferation of mobile money across low- and middle-income countries has led to increased availability of mobile payment systems, which can potentially allow more flexible payment terms for customers. Subsidies increased the use of mechanized desludgings, while pre-paid deposit requirements had...

Free Provision of Drinking Water Treatment and Child Survival: Evidence from Kenya

Ricardo Maertens
Brandon Joel Tan
Diarrhea is a leading cause of death in children under the age of 5, but adding small amounts of chlorine into water can treat water and prevent a large number of these deaths. Providing free dispensers for chlorine to treat water reduced under-five mortality. Children living in villages with dilute...

Psychosocial Support to Improve Mental Health and Child Development Among Rohingya Refugees in Bangaldesh

Tanvir Ahmed Mozumder
Tabassum Rahman
Tanvir Shatil
Abu Siddique
Researchers evaluated the impact of a psychosocial support program on mental health and child development among Rohingya refugees in Bangladesh. Results showed that the support program improved the mental health of mothers and children and led to improvements in early childhood development.

The Impact of a Large-Scale Community-Led Total Sanitation Program in Indonesia

Susan Olivia
Researchers conducted a randomized evaluation to study the impact of a large-scale Community-Led Total Sanitation (CLTS) program in Indonesia on sanitation practices, attitudes towards open defecation, and child health. When implemented by external resource agencies instead of local governments...

Visualizing Future Benefits to Increase Preventive Health Investment, Savings, and Labor Supply in Kenya

Anett John
Researchers evaluated the impact of light-touch psychological interventions on health and economic outcomes, with a particular focus on the chlorination of drinking water. After twelve weeks, visualizing the future increased objectively measured chlorination; it also reduced diarrhea episodes among...

Improving Immunization Coverage Through Incentives, Reminders, and Social Networks in India

Suresh Dalpath
Matthew O. Jackson
Francine Loza
Maheshwor Shrestha
Victor Chernozhukov
Mert Demirer
Iván Fernández-Val
Researchers worked with the state government to evaluate the impact of three programs to build demand for vaccination: local immunization ambassadors, small, non-financial incentives, and tailored SMS reminders. The most effective policy option increased measles vaccination by approximately 55...