For more information about web surveys, or comments on the book or this website, you can contact the authors:

Silvia Biffignandi
University of Bergamo, Faculty of Economics
Via dei Caniana 2,24127 Bergamo, Italy
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Silvia Biffignandi is Professor of Economic and Business Statistics at the University of Bergamo in Italy, where she is also Director of the Centre for Statistical Analyses and Survey Interviewing (CASI). Prof. Biffignandi is coauthor of Handbook of Web Surveys (First Edition), published by Wiley.

Jelke Bethlehem
Leiden University, Institute for Political Science
Albert Verweijstraat 21, 2394 TK Hazerswoude-Rijndijk, The Netherlands
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Jelke Bethlehem is Emeritus Professor in Survey Methodology at the Leiden University, The Netherlands. He was also senior methodological advisor at Statistics Netherlands in The Hague. He is coauthor of Handbook of Nonresponse in Household Surveys, Handbook of Web Surveys (First Edition), and Applied Survey Methods: A Statistical Perspective, published by Wiley. Prof. Bethlehem is also coeditor of Online Panel Research: A Data Quality Perspective and Computer Assisted Survey Information Collection, also published by Wiley.