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Research papers

The quality of online panels

Using a quasi-experimental design – in which data collection methods and recruitment techniques as influencing factors were varied – Ipsos Germany conducted a comparative investigation for Langnese/Unilever to assess the validity of...

Catalogue: ESOMAR Net Effects 2001
Authors: Michael Hoppe, Rainer Lamp
Companies: Ipsos MRBI, Unilever
February 11, 2001