Background Difference-in-differences is a method commonly used in population health research. It is based on assumptions that ...

Sociological research encompasses a diverse toolkit for investigating social life, from large‐scale surveys and statistical modelling to in‐depth ethnography and digital analytics. Survey methods ...

The Methodology Center is an interdisciplinary community increasing methodological rigor to advance health and social science knowledge. We serve as a translational entity between methodologists and ...

As a researcher who has used a wide variety of methodologies, I understand the importance of acknowledging that we, as researchers, do not pick the methodology; rather, the research question dictates ...

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 ...

What Is the Scientific Method? The scientific method is a systematic way of conducting experiments or studies so that you can explore the things you observe in the world and answer questions about ...

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 – ...