Methodological Research

This project is the largest nationally representative survey of its kind to date focused on Asian Americans.

Modern survey tools offer several ways to survey small populations, and in this explainer, we discuss the strengths and weaknesses of prominent approaches.

A new study found that 61% of national pollsters used different methods in 2022 than in 2016. And last year, 17% of pollsters used multiple methods to sample or interview people – up from 2% in 2016.

An error in how the Census Bureau processed data from a national survey provided a rare window into how Brazilians living in the U.S. view their identity.

The Census Bureau has collected data on Americans’ income, race, ethnicity, housing and other things, but it has never directly asked about their religion.

The bureau is considering counting most Americans using Social Security data, IRS files and other administrative records.

Test your knowledge of public opinion polling by taking our 10-question quiz.

By the end of our free, five-lesson course, you will know why we have polls, what the different kinds of polls are, how polling works and what you should look for in a poll.

National polls like the Center’s come within a few percentage points, on average, of benchmarks from high response rate federal surveys.

While the largest Christian traditions and religious “nones” can be consistently analyzed, smaller groups produce a large margin of error.