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 ...

A new study shows bots can be indistinguishable from humans in survey responses. There’s bad news for those using digital surveys to try to understand people’s online behavior: We may no longer be ...

This report presents estimates of the number of unauthorized immigrants in the United States as of July 2023 and for earlier years. As noted earlier in this report, the estimates presented here ...