In this article by McKinsey from 2015, the relevance of diversity in teams is being analysed.
We know intuitively that diversity matters. It’s also increasingly clear that it makes sense in purely business terms. Their research finds that companies in the top quartile for gender or racial and ethnic diversity are more likely to have financial returns above their national industry medians.
Companies in the bottom quartile in these dimensions are statistically less likely to achieve above-average returns. And diversity is probably a competitive differentiator that shifts market share toward more diverse companies over time.