I’m not sure if this is related or not, but another explanation may simply be convenience. If you’re an immigrant, you might want to live in a place where you c

I’m not sure if this is related or not, but another explanation may simply be convenience. If you’re an immigrant, you might want to live in a place where you can easily buy ingredients to make your native cuisine, which implies a mild clustering force. It doesn’t mean you prefer to be around people of your own ethnicity per se. Probably more powerfully, you might want to be in a place that shares your values, irrespective of ethnicity; however, values probably correlate a bit with ethnicity, and thus you end up segregating. With respect to wealth, you probably prefer to live in a place that maximizes value/money, which probably means living among other people in a similar socioeconomic context (economies of scale come into play when you have a lot of people with similar socioeconomic statuses in a small area). So as always, we need to think critically rather than concluding “prejudice” at the first sign of disparity.