Before revision: This paper presents novel evidence for the prevalence of deviations from rational behavior in human decision making - and for the corresponding causes and consequences. The analysis is based on move-by-move data from chess tournaments and an identification strategy that compares behavior of professional chess players to a rational behavioral benchmark that is constructed using  modern chess engines .
After revision: This paper presents a novel approach to analyze human decision-making that involves comparing the behavior of professional chess players to a rational behavioral benchmark that is constructed using modern chess engines .