Wilhelm HofmannWilhelm Hofmann, PhD, is Professor of Social and Economic Cognition at the University of Cologne, Germany. He also has taught and conducted research at the University of Würzburg (Germany), the University of Amsterdam (The Netherlands), and the University of Chicago Booth School of Business. Dr. Hofmann has written more than 60 professional publications, including two books. His research is concerned with desire, self-control, and moral behavior, particularly the emergence of impulses and desires, the role of executive functioning in self-control and health behavior, and the connection among self-control, morality, and happiness. In his methodological approach, he strives to combine the rigor of experimental research with the ecological validity and richness of behavioral data from everyday life.