Tác giả: Mario Callegaro

Mario Callegaro, Survey Research Scientist, Quantitative Marketing, Google Inc., UK Reg Baker, President & Chief Operating Officer, Market Strategies International, USA Paul J. Lavrakas, Nielsen Media Research, Research Psychologist/Research Methodologist, USA Jon A. Krosnick, Professor of Political Science, Communication, Psychology, Stanford University, USA Jelke Bethlehem, Department of Quantitative Economics, University of Amsterdam, The Netherlands Anja Göritz, University of Erlangen-Nuremberg, Department of Economics and Social Psychology, Germany