The primordial days of the COVID-19 outbreak led to a rapid surge in demand — and subsequent shortage — of many consumables, from household goods and protective equipment to the ingredients and ...

In a recent study published in the Journal of the American Medical Association, researchers examined the effectiveness of opt-in and direct-mail strategies for offering self-sampling kits of human ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...