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 ...

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 – ...

In-store samples increase sales, both in the immediate and extended time frame. Sampling drives sharper and more sustained sales than end-of-aisle displays. If incremental cost of a sampling event ...

Consumers love free samples. And while retailers and manufacturers recognize sampling as an important marketing strategy, until now few understood sampling’s effectiveness. PromoWorks commissioned an ...