Famous sociologist Robert Wuthnow gives a great history of polling here. He is critical of low response rates but Pew defended themselves. Wuthnow gave some great ideas of how to improve polling long term.
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Robert Wuthnow critical of low response rates in religious polling. First Things (Aug). http://www.firstthings.com/article/2015/08/in-polls-we-trust … @davideaglephd @edstetzer
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@AndyRowell @edstetzer I share some of Bob's concerns, but accumulating evidence suggests low response rate are not as bad as 1st thought
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@davideaglephd @edstetzer Pew followed up mentioning big data as future http://www.firstthings.com/web-exclusives/2015/07/response-from-pew-research-center-to-in-polls-we-trust … Wuthnow creative too http://www.firstthings.com/web-exclusives/2015/07/robert-wuthnow-replies-to-the-pew-research-center …
Andy Rowell @AndyRowell 
David Eagle @davideaglephd