Using a database overlay on a sample from the MARS OTC/DTC Pharmaceutical Study, we document how the presence of people who like to participate in surveys in general and are interested in the survey topic may bias overall survey results.
Symposium: 2005: Prague, Session 2 - Response and Non Response
Authors: Draves, Lindsey, Soong, Roland, White, Hugh
Organisations: KMR Group
Topics: Response Rates