While I agree with your last paragraph, there have been a number of studies on diversity on corporate boards, for instance: http://www.mckinsey.com/insights/or

While I agree with your last paragraph, there have been a number of studies on diversity on corporate boards, for instance: http://www.mckinsey.com/insights/organization/is_there_a_payoff_from_top-team_diversity http://www.mckinsey.com/insights/organization/is_there_a_pay... http://www.wjh.harvard.edu/~dobbin/cv/workingpapers/Board_Diversity_and_Performance_07_01_10.pdf http://www.wjh.harvard.edu/~dobbin/cv/workingpapers/Board_Di... That's a start. Seems like evidence is mixed, of course, with some part of the evidence "against" diversity confounded by people's unconscious -isms. It's really terrible, these -isms: I start to worry when a woman is named CEO of a major US company because it seems like they only allow a woman in if the company's doing poorly. And it seems that's borne out by some evidence: http://hbr.org/2011/01/how-women-end-up-on-the-glass-cliff/ar/1 http://hbr.org/2011/01/how-women-end-up-on-the-glass-cliff/a... Frustrating.