Does the effectiveness of a “Get Out The Vote” (GOTV) contact depend upon the method by which a voter casts a ballot? This study investigates whether those who must vote by mail are more or less responsive to an in-person mobilization message than voters who live in traditional precincts...

Do presidential campaign advertisements mobilize, inform, or persuade citizens? To answer this question we exploit a natural experiment, the accidental treatment of some individuals living in nonbattleground states during the 2000 presidential election to either high levels or one-sided barrages...

In the social sciences, randomized experimentation is the optimal research design for establishing causation. However, for a number of practical reasons, researchers are sometimes unable to conduct experiments and must rely on observational data. In an effort to develop estimators that can...