Cohort studies are a type of research design. They are also called longitudinal studies because they follow groups of people over time. Results from cohort studies can help people understand human ...

Companies and other organizations use marketing research to manage the risks associated with offering new products and services. These organizations don't want to spend too much money developing a ...

The uneasy ceasefire in eastern Ukraine, punctuated by almost daily fighting between separatists and government forces, posed a major challenge to the Pew Research Center as we set about conducting a ...