Overly cheerful women are less likely to be promoted. That's according to a new study out of Germany.
Men and women were asked to rank who would be the best leader based on whether the candidate was cheerful, prideful or showed no emotion.
Among the candidates cheerful women were ranked the least likely to lead.
According to the economists behind the study, women need to be hard-lined and assertive.
The study suggests companies want bosses to be bossy - tough and uncompromising.