The Growing Gap between Landline and Dual Frame Election Polls – Republican Vote Share Bigger in Landline-Only Surveys – by Scott Keeter, Leah Christian and Michael Dimock, Pew Research Center, November 22, 2010
The Growing Gap between Landline and Dual Frame Election Polls – Republican Vote Share Bigger in Landline-Only Surveys – by Scott Keeter, Leah Christian and Michael Dimock, Pew Research Center, November 22, 2010
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