Historically, public opinion surveys have relied on the ability to adjust their datasets using a core set of demographics – sex, age, race and ethnicity, educational attainment, and geographic region ...

Pew Research Center’s team of demographers, economists and other analysts accesses and uses a wide variety of publicly available data sources to conduct its population research. Much of this data is ...

The nuts and bolts of our public opinion surveys. A summary of ABC News' polling standards and survey methodology follows. ABC News maintains standards for disclosure, validity, reliability and ...

Hans von Spakovsky was an authority on a wide range of issues for Heritage—including civil rights, civil justice, the First Amendment, immigration. The 2020 Post-Enumeration Survey (PES) revealed ...