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. Fresh ...

verybody has a favorite color and season—preferences that seem innate, always defying reason. Auditors are no different when it comes to haphazard sampling, a process in which—ideally—they choose ...

The World Wide Web contains a vast corpus of consumer-generated content that holds invaluable insights for improving the product and service offerings of firms. Yet the typical method for extracting ...

Here at Pew Research Center, we are often asked about how we conduct our research. We work hard to make our methodologies transparent and understandable, but we also know that survey mode effects and ...

Passive sampling has emerged as an indispensable tool for monitoring hydrophobic organic contaminants (HOCs) in diverse environmental media. By employing polymer-based materials, researchers are able ...

The research group FQM-215—Affordable and Sustainable Sample Preparation at the University of Córdoba has developed a method ...