Gerber, Alan S. & Donald P. Green (2005) "Do Phone Calls Increase Voter Turnout? An Update" Annals of the American Academy of Political and Social Science 601: 142-154. doi: 10.1177/0002716205278445
This article estimates the extent to which nonpartisan phone calls from commercial phone banks increase voter turnout. Prior to the 1998 and 2002 elections, randomized field experiments were conducted in which more than 1 million subjects were randomly assigned to treatment and control conditions. The results indicate that this type of phone calling campaign is ineffective.
Link to article here.
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