"ethnic clusters" is a correct and usable part of a sentence in written English.
It is generally used to refer to groups of people who share a common ethnic identity, such as a particular nationality, race, language, etc. For example, "The country has several ethnic clusters, including a large population of Chinese immigrants."
There will always be ethnic clusters, and it is not the end of the world.
Larger ethnic clusters, such as the Bangladeshis of Tower Hamlets, have created thriving businesses and, over the past ten years, seized control of local public institutions.
Many of the original ethnic clusters have retained a degree of homogeneity, however, especially in rural areas where few in-migrants have settled.
The location of foreign owned houses is linked to the geography of ethnic clusters as well as areas where high potential investment returns are perceived.
Finally, we characterize the place of residence of migrants to approximate to what extent they live in ethnic clusters or not.
A graphical representation of the haplogroup phylogeny and distribution among ethnic clusters was built in netViz 6.5 [ 69].
For years, Little Italy has been more of a theme park than an ethnic cluster.
Given the racial and ethnic clustering that persists around America, the result has been that the University of Texas and the state's other top public universities have maintained greater demographic diversity than they presumably would have in the absence of both affirmative action or some other intervention, like the one in question.
Residential ethnic clustering strengthens immigrants' affiliation with the respective country of origin.
Genetics may partially explain some of the ethnic clustering of these phenotypes, modulated by cultural and environmental factors.
It will be interesting to study the residential ethnic clustering which causes a change in the state of ethnic identity.
