Of three mobilization methods: robo calls, direct mail and phone calls, only live phone calls produce statistically significant mobilization effects among Latino voters.

In-language calls and English or bilingual direct mail are found to increase voter turnout among Asian Americans.

The quality and timing of GOTV phone calls are more important than message content or whether the calls are made by volunteers or paid professionals. Professional phone banks are found to be cost-competitive with canvassing and leafleting and more effective than the calls placed by volunteers.

Pooled results from eight voter mobilization volunteer phone call experiments indicate that brief volunteer phone conversations that are personal in tone can be effective in mobilizing voters. Volunteer phone campaigns can be cost-effective with door-to-door canvassing.

Partisan GOTV campaign tactics are estimated to produce mobilization effects similar to results reported in nonpartisan experiments. Partisan door hangers may be more effective than nonpartisan doorhangers in mobilizing voters.

Results from four separate experiments in which varying degrees of partisan or non-partisan messages are presented. Only results from the nonpartisan phone campaign experiment yielded substantive and statistically significant estimated mobilization effects.

An election day mobilization campaign targeting registered voters between the ages of 18 and 25 is found to increase turnout, particularly among voters that had previously expressed an intention to vote.