I think it's based on work done by McKinsey. They found that those companies with higher than average gender and ethnic minority representation (which I guess they could measure more easily than other forms of diversity) outperformed their industry-region median in terms of EBIT.
Seeing as you seem to be having trouble understanding what seems to be pretty clear, or alternatively are simply dismissing the research finding, here's the result of a quick Google search which confirms Rachel's comment above. https://www.mckinsey.com/featured-insights/diversity-and-inclusion/diversity-matters-even-more-the-case-for-holistic-impact
“Businesses that embed diversity have 25% higher financial results.”
I have read this half-a-dozen times and I still have no idea what it means.
More ebitda - mc Kinsey although that research has some doubters, and HBR 2013 found 20% more profit in balanced teams by gender
I think it's based on work done by McKinsey. They found that those companies with higher than average gender and ethnic minority representation (which I guess they could measure more easily than other forms of diversity) outperformed their industry-region median in terms of EBIT.