Search our database of 1,200+ summaries of randomized evaluations conducted by our affiliates in 97 countries. To browse key policy recommendations from a subset of these evaluations, visit the Policy Publications tab above.

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The Impact of Credit-Scoring on Small and Medium Enterprise (SME) Lending and Performance in the Philippines

Gharad Bryan
Pamela Jakiela
Dean Karlan
Daniel Keniston
Table with condom, vials, and meters for HIV testing

Can Lotteries Help Prevent HIV Among Youth? Evidence from Lesotho

Lucia Corno
Martina Björkman Nyqvist
Jakob Svensson
Damien de Walque
Researchers conducted a randomized evaluation to test the impact of lottery-based financial awards given to young individuals who tested STI-negative on their likelihood of contracting HIV and engaging in risky sexual behavior. The intervention provided frequent rewards at short intervals to bring...
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Attracting Talented Workers by Reducing Application Costs in Ethiopia

Girum Abebe
Stefano Caria
Esteban Ortiz-Ospina
Researchers partnered with an employer in Addis Ababa to assess the impact of a small monetary incentive to apply for a job or a higher wage offer on the quality of applicants to a vacancy for a clerical position. Both of these changes increased the quality of applicants by similar amounts.

Mobilizing Black Voters Using Direct Mail and Commercial Phone Banks in the United States

Donald Green
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Encouraging Interregional Contact to Foster National Identity in Spain

Manuel Bagues
Christopher Roth
Researchers evaluated the long-run effects of temporary contact between individuals from different regions during military service on interregional attitudes and national identity sentiments among former Spanish male conscripts. Overall, conscription outside of one’s region of origin led to positive...

The Role of Extrinsic and Intrinsic Motivations for Tax Compliance in Germany

Diffusion of Agricultural Information within Social Networks: Evidence on Gender Inequalities from Mali

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Countering Covid-19 Misinformation through WhatsApp in Zimbabwe

Jeremy Bowles
Horacio Larreguy
Shelley Liu
In this randomized evaluation in Zimbabwe, researchers studied how social media messages targeting misinformation can affect people’s beliefs about and responses toward Covid-19. The study found that these messages increased participants’ knowledge of Covid-19 information by 7 percentage points and...