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 ...

Survey researchers increasingly recognize that a single survey of the general public can rarely represent the views of small groups of Americans. Such surveys frequently have too few interviews with ...

Adolescents and young adults with diverse sexual and gender identities bear a disproportionate burden of health adversities.1 ...

New research has led to a model that assesses the short- and long-term effects of in-store product sampling on sales of both the products offered on sample and competitive products. In big box stores, ...