Search our database of 1041 randomized evaluations conducted by our affiliates in 89 countries. To browse summaries of key policy recommendations from a subset of these evaluations, visit the Policy Publications tab.

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The Role of the VAT for Tax Enforcement

The Value Added Tax (VAT) system, which generates a paper trail on transactions between firms, facilitated tax enforcement by spreading the impact of enforcement measures up the production chain in a study with over 400,000 firms in Chile.

Improving Electoral Integrity with Information and Communications Technology in Uganda

Clark Gibson
Danielle Jung
James D. Long

Researchers sent letters to polling stations announcing smartphone vote-tally audits to evaluate the impact of audits on electoral irregularities such as non-adherence to transparency regulations and falsified vote tallies. Relative to a comparison group, letters increased the number of polling...

Election Fraud and Government Legitimacy in Afghanistan

James Long
Eli Berman
Clark Gibson

Researchers evaluated the impact of photographic monitoring technology on aggregation fraud and perceptions of government legitimacy during the 2010 parliamentary elections in Afghanistan. The announcement of a new monitoring technology reduced both theft of election materials and vote counts for...

Reducing Voter Registration Costs in France

Celine Braconnier
Jean-Yves Dormagen
Researchers evaluated the impact of making voter registration easier on voter participation by providing information about voter registration and home registration visits. Overall, the results suggest that information and visits can encourage greater participation, particularly among groups that...

Improving Targeting of a Conditional Cash Transfer Program in Indonesia

Vivi Alatas
Ririn Purnamasari
Matthew Wai-Poi

Researchers conducted a randomized evaluation with the Indonesian government that compared self-targeting to automatic screening in the context of a conditional cash transfer program. Requiring households to apply for a cash transfer program in Indonesia discouraged rich households from seeking out...

Increasing the Electoral Participation of Immigrants: Experimental Evidence from France

Guillaume Liegey

Researchers conducted a randomized evaluation to test the impact of a general voter outreach effort on the political participation of immigrants relative to participation of non-immigrants. The canvassing treatment increased voter turnout of immigrants without affecting turnout of non-immigrants.

Testing the Effectiveness of Payments for Ecosystem Services to Enhance Conservation in Uganda

Charlotte Stanton
Joost de Laat
Eric Lambin
In Uganda, researchers conducted a randomized evaluation to test the effectiveness of a program in which landowners were paid to not cut forest trees on their property. During the study period, landowners who were offered contracts to conserve forest cleared 4 percent of forested land, compared to 9...

Improving Take-Up of Tax Benefits in the United States

Saurabh Bhargava

In the United States, many people who are eligible for social and economic benefits do not claim those benefits. Researchers partnered with the U.S. Internal Revenue Service (IRS) to test the effectiveness of different messages to taxpayers designed to encourage them to claim certain tax benefits.