Sociologist Cedric Herring has just completed his study on diversity. He has found that companies that are more diverse have more customers, a larger share of their markets and greater profitability. In fact, when Herring puts his numbers on a graph, he finds a linear relationship between diversity and business success, meaning that as diversity increases, those business indicators increase in step.
See "In Boardrooms and in Courtrooms, Diversity Makes a Difference", Shankar Vedantam, The Washington Post, January 14, 2007