Notice: the WebSM website has not been updated since the beginning of 2018.

In M. Callegaro, R. Baker, J. Bethlehem, A. S. Göritz, J. A. Krosnick and P. J. Lavrakas (eds.): Online Panel Research: A Data Quality Perspective. John Wiley & Sons, Ltd, Chichester, UK


Data has been last edited on Jun 30 2014