That could just be from gentrification pushing lower income people out of the city center. Similar things have happened in DC, Chicago, etc. This Wired article shows some of that effect. <a href="http:&#x2F;&#x2F;www.wired.com&#x2F;2013&#x2F;08&#x2F;how-segregated-is-your-city-this-eye-opening-map-shows-you&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.wired.com&#x2F;2013&#x2F;08&#x2F;how-segregated-is-your-city-thi...</a>