This study looks at how national public opinion polling in the United States changed from 2000 to 2022. It focuses on two aspects: the sample source(s) – that is, where the survey takers came from – ...

Pew Research Center’s experts provide analysis of trends shaping the world grounded in the Center’s rigorous empirical research. Because the Center is strictly neutral, its experts do not make policy ...

This book shows researchers in education, psychology, health, and other social sciences how to mix qualitative and quantitative research methods together with confidence. How can researchers sequence ...

Bibliometric analysis is crucial for evaluating scientific publications, traditionally relying on metrics like citation count ...

This report provides an overview of the methodology used to produce the official United Nations estimates and projections of urban and rural populations for 233 countries and areas of the world and ...