From Wallethub:
Susan K. Brown, associate professor of sociology at University of California, Irvine. … Which types of diversity are good or bad for cities? Diversity covers a lot of potential dimensions: race and ethnicity, socioeconomic status, religion, age, and sexual orientation, to name a few. The ideal diversity is cross cutting, that is, where the dimensions don’t align.
 
For the full story, please visit http://wallethub.com/edu/most-diverse-cities/12690/#susan-k-brown.