This report included six online platforms used for public polling. Three are opt-in survey panels or “marketplaces.” One is an opt-in crowdsourcing labor website. Two are survey panels that interview ...
Once the decision to collect primary data is made, the data collection modality needs to be defined. It is often pre-determined depending on each individual operation’s characteristics such as ...
The data in this Pew Research Center report is drawn from a national cross-sectional survey conducted by Westat. The sampling design of the survey was an address-based sampling (ABS) approach, ...
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