National or international cohort studies that follow a large group of individuals over time to understand factors that lead to different outcomes. They are useful for studies that need a large amount ...

For marketers, research is a foundation for sound decision making. Data that's gathered from research can provide direction for new product development, AI, big data and marketing strategies. Good ...

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 ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. One reality of the polling world is item nonresponse — that is, when survey ...