We present an experiment on strategic thinking and behavior of individuals and teams in oneshot normal-form games. Besides making choices, decision makers have to state their firstand second-order beliefs. We find that teams play the Nash strategy significantly more often, and their choices are...

Social preferences have been shown to be an important determinant of economic decision making for many adults. We present a large-scale experiment with 883 children and adolescents, aged eight to seventeen years. Participants make decisions in eight simple, one-shot allocation tasks, allowing us...