feature | Nov 15, 2019

Video: Estimating Europe’s unauthorized immigrant population

A new Pew Research Center analysis estimates that at least 3.9 million unauthorized immigrants – and possibly as many as 4.8 million – lived in Europe in 2017. Learn how we conducted the first comprehensive estimate of Europe's unauthorized immigrant population in over a decade.

feature | May 14, 2018

Video: Can we still trust polls?

Recent events – including the 2016 presidential election and Brexit – have rattled public confidence in polls. But this video explains why well-designed polls can still be trusted and remain an important way to measure public opinion.

feature | Apr 9, 2018

Video: How did we identify Twitter bots?

The Pew Research Center set out to better understand how many of the links being shared on Twitter are being promoted by bots rather than humans. Our analysis found that an estimated two-thirds of tweeted links to popular websites are posted by automated accounts – not human beings.

feature | Mar 21, 2018

Methods 101: Survey Question Wording

The second video in Pew Research Center's Methods 101 series helps explain question wording – a concept at the center of sound public opinion survey research – and why it’s important.

report | Mar 21, 2018

The Science People See on Social Media

Science-related Facebook pages draw millions of followers but feature more posts with ‘news you can use’ or ads than scientific discoveries

feature | May 12, 2017

Methods 101: Random Sampling

The first video in Pew Research Center’s Methods 101 series helps explain random sampling – a concept that lies at the heart of all probability-based survey research – and why it’s important.

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