Methodological Research

A new analysis of Pew Research Center pre-election surveys conducted this year finds that support for Republican candidates was significantly higher in samples based only on landlines than in dual frame samples that combined landline and cell phone interviews. The difference in the margin among likely voters this year is about twice as large as in 2008.

The Census Bureau today released five sets of population estimates for the nation as of April 1--but not from the soon-to-be-released 2010 Census count.

Senior research staff answer questions from readers relating to all the areas covered by our seven projects, ranging from polling techniques and findings, to media, technology, religious, demographic and global attitudes trends.

Data from Pew Research Center polling this year suggest that the landline-only bias is as large, and potentially even larger, than it was in 2008.

Senior research staff answer questions from readers relating to all the areas covered by our seven projects, ranging from polling techniques and findings, to media, technology, religious, demographic and global attitudes trends.

The Census Bureau just released its 2009 American Community Survey statistics, and included some additional analysis to address public interest in using the data to document the impact of the economic downturn.

Senior research staff answer questions from readers relating to all the areas covered by our seven projects, ranging from polling techniques and findings, to media, technology, religious, demographic and global attitudes trends.

The Wall Street Journal’s Numbers Guy columnist, Carl Bialik, recently wrote a print column and blog posting about the limited amount of information available on the size of religious populations in the U.S. The Census Bureau is barred from asking about religious affiliation, but dozens of other countries do so in their own headcounts. The […]

Why doesn't Pew Internet report findings for Asians, Pacific Islanders or other groups as part of its standard demographic variables?

New York legislators have passed a bill that would count prisoners at their home addresses, not those where they are incarcerated, for purposes of redrawing state and local legislative districts using data from the 2010 Census next year.