Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

Measuring the identity of Taiwanese Americans, and Asian origin groups in the United States more generally, is a challenging endeavor, whether in survey research or when trying to generate estimates ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

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 ...

With the approval of the State Council of the People’s Republic of China, the Second China National Sample Survey on Disability (hereinafter referred to as “the Survey”) is under way from 2006 to 2007 ...