Making the paper: Ernst Fehr.

The article reports on the study by economist Ernst Fehr of the University of Zurich in Switzerland on the effect of testosterone on social behavior. Fehr and colleagues gave a group of women a testosterone pill and another a placebo and observed their behavior while playing a game. It shows that the negative perception of testosterone as a substance linked to aggression may have affected women's behaviour in a negatively, although the hormone had a positive effect on social interactions.