Search our database of 1133 randomized evaluations conducted by our affiliates in 93 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 Targeted Mailers to Re-Engage US Voters with Criminal Convictions

Jennifer L. Doleac
Laurel Eckhouse
Eric Foster-Moore
Allison Harris
Hannah Walker
Ariel White
Researchers evaluated the impact of targeted mailings encouraging people with criminal records to register to vote on voting behavior in North Carolina. Mailers increased both voter registration and general election turnout among people with past criminal convictions.

Public Recognition and Fundraising in the United States

Researchers used two experiments to identify whether the motive for giving in public can be primarily linked to a desire for prestige (the “image” effect) or a hope that a public gift will influence others (the “signal” effect). They found that a desire to improve social image largely explained why...

Information Dissemination Campaign and Voters' Behavior in the 2009 Municipal Elections in Mexico

Alberto Chong
Ana De La O
Researchers randomly assigned voting precincts to a campaign spreading information on corruption and public expenditure conducted one week before the 2009 municipal elections in Mexico. Providing incumbent corruption information not only decreased incumbent party support, but also decreased voter...

When do Media Stations Support Political Accountability? A Field Experiment in Mexico

Christopher Lucas
John Marshall
Researchers are using a randomized evaluation in Mexico to study the incentives media stations face when choosing to provide voters with indicators of their incumbent party’s performance in office.

Effect of Matching Ratios on Charitable Giving in the United States

Researchers found that matching gifts were an effective fundraising tactic, increasing the likelihood of donation and total donations, but larger match ratios did not return more donations than smaller match ratios.

Effect of Media on Voting Behavior and Political Opinions in the United States

Daniel Bergan
This study measured the effect of receiving free subscriptions to either a liberal or conservative-leaning newspaper on voters’ political knowledge and opinions in the United States. Results demonstrated that neither subscription had an impact on voters' political knowledge, but that both...