Door-to-door canvassing is found to increase turnout not only in the person directly contacted by the canvassers. In two-member households, the uncontacted member of the households is also mobilized by GOTV canvassing.
A partisan canvassing campaign is found to be effective in mobilizing voters in the tightly contested 2004 presidential election.
Gerber, Grebner, Green and Larimer 2006 - Effect of Publicizing Individual Turnout on Voter Mobilization
Pre-election and post-election mailings that publicize neighbors' turnout records in an election are found to be effective in mobilizing voters. Social pressure to adhere to civic norms may resolve "paradox of participation."