We highlight why transparency matters in opinion polling — plus more from two recent webinars with the Roper Center.

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Pew Research Center illustration; “Wee People” by Alberto Cairo/ProPublica are ...

Protocols for weighting ATP surveys have evolved over the history of the ATP. The modifications have been gradual changes introduced over time, as opposed to sudden, dramatic shifts in the weighting ...

Survey nonresponse has consequences, most notably the potential for nonresponse bias. The techniques and procedures for dealing with nonresponse bias depend on how one approaches the problem. Singer ...