There is a Harvard Business Review study by Professors Anita Woolley and Thomas Malone, in which the researchers studied how team/group diversification would impact overall team intelligence (you can view their explanation of the findings in Defend Your Research: What Makes A Team Smarter? More Women).
Big surprise to all us husbands, they found that teams with more women are smarter! From the article:
“The standard argument is that diversity is good and you should have both men and women in a group. But so far, the data show the more women, the better. We have early evidence that performance