To better understand the current landscape of commercially available online nonprobability samples, Pew Research Center conducted a study in which an identical questionnaire was administered to nine ...

One possible explanation for the variability in estimates across the different nonprobability samples is the range of methods that online sample vendors employ. They differ on recruitment, weighting ...

Statistical estimation in survey sampling encompasses a range of methods designed to infer population parameters from observed data in a manner that is both unbiased and efficient. Traditional ...

UK – At a lecture hosted by the International Journal of Market Research (IJMR), researchers from Kantar, NatCen and Ipsos Mori discussed the future of random probability sampling. Random probability ...

This study reports the findings of a comparison between different non-probability sampling methods applied in a WWW-user-survey. This study reports the findings of a comparison between different ...

Random probability based surveys provide a strong theoretical foundation and underpin the basis of much of market research, but the industry has been experiencing a steady decline in response rates ...