Well, there is certainly more than 1 possible explanation for this data, and because the real world is messy the real cause is probably more than 1 of them. Other people have already mentioned increased competitiveness from males and diversity of opinions. I'll offer another explanation, which fits well with "traditional" gender roles: women are better at collaborative work and facilitating collaboration among others.
Comments
Well, there is certainly more than 1 possible explanation for this data, and because the real world is messy the real cause is probably more than 1 of them. Other people have already mentioned increased competitiveness from males and diversity of opinions. I'll offer another explanation, which fits well with "traditional" gender roles: women are better at collaborative work and facilitating collaboration among others.