Outcome-dependent sampling designs are strategic methodologies in longitudinal research that prioritise the selection of study subjects based on observed outcomes. Rather than relying on random ...

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 ...

Pew Research Center’s international surveys are largely conducted via telephone or face-to-face interviews, depending on the country. (The exceptions are the United States and Australia, where surveys ...