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.

Term Length and the Effort of Politicians in Argentina

Researchers examined two occasions in which an Argentine Congressional chamber was subject to randomly assigned term lengths as a result of political or constitutional changes. Assignment to a longer term increased overall legislative effort.

Long-run and Intergenerational Impacts of Child Health Gains from Deworming in Kenya

Joan Hamory Hicks
Patricia Kariger
Michael Walker
Researchers conducted long-term follow-ups a mass school-based deworming program in western Kenya, which had substantially improved health and school participation of treated children, as well as of untreated children in treatment schools and children in neighboring schools in the short-term...

The Medium-Term Educational Effects of Short-Term Literacy Tutoring in Chile

Verónica Cabezas
Jose Ignacio Cuesta
Researchers conducted a randomized evaluation to gauge whether a short-term reading tutoring program could improve a range of student educational outcomes in the short- and medium-term (up to eight years after the program). They found that the program increased language test scores in the short term...

Long-Term Effects of a Conditional Cash Transfer Program in Nicaragua

John A. Maluccio
Researchers worked with the Government of Nicaragua to evaluate the long-term impact of time-limited CCTs on education, reproductive health, and labor market outcomes. Ten years later, people whose families were offered cash transfers when they were younger children had higher labor force...

The Long-Term Impacts of Conditional Cash Transfers in Honduras

Researchers used census data in Honduras to determine the impact of PRAF-II, a CCT program, 13 years after it began. They found that the CCT program had positive impacts on educational attainment and international migration for non-indigenous individuals, but had more mixed impacts on marriage...

Teaching Patience in Classrooms for Improved Student Decision-Making and Behavior in Turkey

Seda Ertac
Researchers introduced an educational program focused on teaching patience to evaluate the impact on students’ decision-making and willingness to wait for a future reward over the present. Students assigned to the program demonstrated more patient decision-making, which persisted almost three years...

The Impact of a Multi-faceted Livelihoods Program on Low-income Households in India

In India, researchers partnered with Bandhan Konnagar to evaluate the impact of a multi-faceted livelihoods program known as the Graduation approach, which aims to encourage occupational change among people living in extreme poverty. The Graduation approach had large and positive effects on economic...

Short- and Long-Term Impacts of Cognitive Behavioral Therapy on Maternal Depression in Pakistan

Sonia Bhalotra
Pietro Biroli
Joanna Maselko
In low- and middle-income countries (LMICs), approximately twenty percent of women who bear children experience depression during pregnancy or in the year after their child’s birthday, called perinatal depression, but they are rarely diagnosed or treated. Researchers evaluated the impact of a...

Land Leases to Semi-Nomadic Herders in Peri-Urban Areas of Mongolia

Herders may change their herding practices to better sustain the land if they own rights to it, which could also translate into bigger and healthier animals, and more income for the herders. In this study, carried out near two cities in Mongolia, researchers evaluated the impact of private property...

Time Inconsistency and Saving among Low-Income Tax Filers in the United States

Present-biased preferences, or the tendency to value immediate rewards over greater benefits in the future, may contribute to persistent poverty, preventing low-income households from accumulating savings, making investments, and rationing their resources over time. However, there is little rigorous...

The Medium-Term Impact of Conditional Cash Transfers on Health and Education in Indonesia

Nur Cahyadi
Rizal Adi Prima
SUDARNO SUDARNO
Ekki Syamsulhakim
Researchers examined the medium-term impacts of a large-scale CCT program on health, education, and economic outcomes in Indonesia. Six years following the introduction of cash transfers, the program resulted in reductions in stunting, increased rates of childbirth in the presence of trained birth...

A 20-year Follow-Up to an Early Childhood Stimulation Program in Jamaica

Susan M. Chang-Lopez
Sally Grantham-McGregor
James J. Heckman
Rodrigo Pinto
Christel Vermeersch
Susan Walker
Arianna Zanolini

Dairy Market Responses to Saving Constraints in Kenya

In partnership with a local dairy cooperative, researchers utilized a combination of evaluations and surveys to measure dairy farmers’ responses to various price and timing incentives. They found that farmers willingly declined daily payments at higher milk prices in favor of monthly payments at...

The Medium-Term Impacts of High-Achieving Charter Schools in the United States

Researchers examined results of a school admissions lottery to measure the impact of charter school education on students after six years. They found that offering a charter education resulted in improved test scores, higher college enrollment, a reduction in specific risky behaviors, and no...

Investing Cash Transfers to Raise Long-Term Living Standards in Mexico

Sebastian Martinez
Marta Rubio-Codina
Researchers conducted a randomized evaluation of the impact of the Oportunidades CCT program in Mexico on recipients’ investments decisions and long-run poverty levels. They found that the cash transfers promoted long-term increases in consumption through investment in productive activities...

Understanding Borrowers' Decisions: Payday Loans in the United States

Researchers partnered with a large payday lender in Indiana to conduct an evaluation to better understand consumers’ decision-making. The results suggest that average borrowers can anticipate their probability of taking loans in the future. However, people focus too much on the present when making...

The Impact of Cognitive Behavioral Therapy and Cash Transfers on High-Risk Young Men in Liberia

Sebastian Chaskel
Margaret Sheridan
To understand the long-term effectiveness of CBT among adults, researchers evaluated the impact of a short-term CBT program and the distribution of unconditional cash transfers on the behavior of high-risk young men in Liberia. CBT reduced criminal behavior among participants both in the short run...

Why Don't People Insure Late Life Consumption in the United States?

Jeffrey Brown
Jeffrey Kling
Marian Wrobel
Researchers evaluated the effect of the framing of potential investment options on people's investment in life annuities. They found that individuals were more likely to prefer an annuity when their options emphasized future consumption, rather than framing options in terms of investments. These...

The Impact of Long-Range Weather Forecasts for Farmers’ in India

In India, researchers conducted a randomized evaluation to test the impacts of providing long-range, seasonal weather forecasts on farmers’ investments on and off the farm, and their well-being. They found that farmers who had access to the forecast updated their beliefs about the upcoming...

Dependence Duration and Labor Market Conditions: Evidence from the United States

Researchers conducted a randomized evaluation to assess the role of employer behavior in generating "negative duration dependence"—the adverse effect of longer unemployment spells—by sending fictitious resumes to real job postings in 100 U.S. cities. Callback rates declined sharply over the first...

Microfinance Repayment Schedules in West Bengal, India

John Papp
Jeannie Park
Researchers tested two features of these contracts, repayment frequency and the time of the first repayment, to determine if characteristics of the loan contract affect borrowers’ repayment behavior and the types of investments they make. They found that less frequent repayments did not increase...

Reducing Bank Overdraft Usage through Price Discounts and SMS Reminders in Turkey

Researchers evaluated the impact of informational reminders and price discounts on bank clients’ overdraft usage in Turkey. While messages on the availability of overdraft protection services increased usage, messages promoting an overdraft discount actually reduced overdraft usage, potentially...

Commitment Contracts for Smoking Cessation in the United States

This study will examine whether a combination of positive and negative commitment devices can induce long-term smoking cessation in smokers from a low-to-moderate income background in Connecticut.

Comparing the Impacts of Industrial Jobs and Self-Employment in Ethiopia

In Ethiopia, researchers randomly assigned mostly female jobseekers to receive an industrial job offer or an unconditional cash transfer, meant to spur self-employment. While they found positive impacts of the cash transfers on occupational choice, income, and health in the first year, these effects...