Evaluations

Researchers measured the impact of receiving phone calls on registered voters’ likelihood of voting in general elections in the United States. The study found that non-partisan, get-out-the-vote (GOTV) phone calls had no effect on voter turnout.

To test the impact of an automated phone call from a credible source on voters’ preferences and behavior, researchers delivered the message to random voters in two concurrent randomized evaluations. The call did not increase voter turnout or change voter preferences, suggesting that automated phone...

Researchers randomly provided postage-paid envelopes to a subset of permanent absentee voters in San Mateo County, California in order to evaluate its impact on voter turnout. The provision of prepaid postage resulted in no net change in voter turnout because it simultaneously decreased the number...

Researchers from Yale University conducted a randomized evaluation to examine the effects of political party identification on political attitudes and opinions. Participants in the study who received a printed letter indicating that they must register with a political party to vote in an upcoming...

Early in the 2006 campaign for governor of Texas, the launch date and volume of television advertisements as well as the launch date of radio advertisements for the incumbent candidate were randomly assigned across media markets to evaluate the impact of the ads on public opinion. Results indicate...

Researchers used a randomized evaluation to test how local leaders influence the voluntary provision of public goods. They solicited contributions for environmental education books, which all members of the community would be able to access, and varied whether leaders made public contributions. They...

Researchers used two randomized evaluations 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...

Community-based approaches to development, also called community-driven development (CDD), seek to empower local communities to identify and implement the projects they most need. Researchers evaluated the impact of a national community-driven development program in the Philippines on governance...