Jeffrey S. Passel, senior demographer, on the research techniques used to derive the unauthorized immigrant population estimate in the U.S. and the challenges involved.
A new telephone survey experiment finds that an opinion poll drawn from a commercial voter file produces results similar to those from a sample based on random-digit dialing.
A new analysis demystifies voter files, the widely-used and comprehensive digital databases used to better understand the U.S. electorate.
As oversampling and its possible effect on presidential polls are spotlighted ahead of Election Day, learn more about this practice and how pollsters adjust for it.
High-profile polling failures in recent elections have drawn attention to the challenges in using surveys to predict outcomes. Our study examines various methods of determining who is a likely voter.
Surveying Hispanics is complicated for many reasons – language barriers, sampling issues and cultural differences – that are the subject of a growing field of inquiry.
We released our first report on American multiracial adults, a group that comprises an estimated 6.9% of the adult population, or nearly 17 million adults. The report looks at who they are demographically, their attitudes and experiences, and the spectrum of their racial identity.
Demographer Conrad Hackett explains how he and his team put together our major new report and why it differs from past efforts to predict religious change.