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 ...

Suggested Citation: "1 Designing Surveys Acknowledging Nonresponse." National Research Council. 2002. Studies of Welfare Populations: Data Collection and Research Issues. Washington, DC: The National ...

Suggested Citation: "Practice 3: Use of Multiple Data Sources for Statistics That Meet User Needs." National Academies of Sciences, Engineering, and Medicine. 2017. Principles and Practices for a ...