Mixed unions: The ideal? or 'brownwashing?'

A study published this year by Feng Hou, Zheng Wu and Christoph Schimmele found that the intermarriage rate among members of an ethnic group goes down in regions that house a large cohort of that group. 

http://blogs.vancouversun.com/2015/07/26/mixed-unions-the-ideal-or-brownwashing/