تصفح Social & Economic Survey Research Institute حسب الموضوع "Random Digit Dialing"
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Who needs RDD? Combining directory listings with cell phone exchanges for an alternative telephone sampling frame
( Elsevier , 2011 , Article)Abstract The traditional Random Digit Dialing method (list-assisted RDD using a frame of landline phone numbers) is clearly under threat. The difficulty and costs of completing telephone surveys have increased due to ...