Evans Witt | Pew Research Center

Evans Witt | Pew Research Center


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reportMay 24, 2008 Introduction In the past few years, the growing number of Americans living in households without landline telephones has challenged survey researchers to develop a variety


of approaches to deal with this non-coverage issue. One approach is to add interviews over the cell phone to traditional random digit dial surveys of landline telephones.1 Adding cell phone


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