CBS News/New York Times Call-Back Poll, October 2008
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https://www.icpsr.umich.edu/web/ICPSR/studies/26823/versions/V1
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This call-back poll reinterviewed respondents who had participated in a poll fielded September 21-24, 2008. In the original poll, a variation of random-digit dialing using primary sampling units (PSUs) was employed, consisting of blocks of 100 telephone numbers identical through the eighth digit and stratified by geographic region, area code, and size of place. Phone numbers were dialed from RDD samples of both standard land-lines and cell phones. Within households, respondents were selected using a method developed by Leslie Kish and modified by Charles Backstrom and Gerald Hursh (see Backstrom and Hursh, SURVEY RESEARCH. Evanston, IL: Northwestern University Press, 1963).
创建时间：
2023-06-28
