Patric Andersson is associate professor of business administration at the Stockholm School of Economics, where he also received his Ph.D. in economic psychology. His main research interest concerns decision-making, expert judgement, judgmental forecasting, and behavioural finance. Dr. Andersson has published numerous articles in peer-reviewed journals. Peter Ayton is professor of psychology at City University, London. His research is focused on the psychology of human judgment and decision making—particularly under conditions of risk and uncertainty. His previously edited volumes include “Subjective Probability” and “Judgmental Forecasting”. Carsten Schmidt is post-doctoral researcher at the University of Mannheim and heads the experimental laboratory at Sonderforschungsbereich 504. He holds a doctoral degree in economics and information systems from Humboldt University Berlin. Dr. Schmidt conducts research on behavioural and experimental economics and electronic market design and has published numerous articles in peer-reviewed journals.