In America, racial diversity has much more often come to white neighborhoods. Between 1980 and 2000, more than 98 percent of census tracts that grew more diverse did so in that way, as Hispanic, Asian-American and African-American families settled in neighborhoods that were once predominantly white.

But since 2000, according to an analysis of demographic and housing data, the arrival of white residents is now changing nonwhite communities in cities of all sizes, affecting about one in six predominantly African-American census tracts. The pattern, though still modest in scope, is playing out with remarkable consistency across the country — in ways that jolt the mortgage market, the architecture, the value of land itself.

In city after city, a map of racial change shows predominantly minority neighborhoods near downtown growing whiter, while suburban neighborhoods that were once largely white are experiencing an increased share of black, Hispanic and Asian-American residents…

At the start of the 21st century, these neighborhoods were relatively poor, and 80 percent of them were majority African-American. But as revived downtowns attract wealthier residents closer to the center city, recent white home buyers are arriving in these neighborhoods with incomes that are on average twice as high as that of their existing neighbors, and two-thirds higher than existing homeowners. And they are getting a majority of the mortgages.

The examples provided are intriguing to consider but the summary data is hard to come by in this article. A few thoughts:

1. How many whites are actually moving into what are black neighborhoods? Are these significant shifts or relatively few new residents?
2. The suggestion is that many census tracts are affected – “about one in six predominantly African-American census tracts.” If the amount of change is not much, this may not mean a whole lot. For both #1 and #2, the article said the changes are “still modest in scope.”
3. Do the affected census tracts have relatively low densities or populations that have decreased over the years? In other words, are these areas with depressed land values or are they wealthier minority neighborhoods whites are entering? If it is the first, could this be a side effect of the inflated housing values in many metropolitan areas?
4. The focus of this article is also on mortgages and gentrification: the arriving white residents are more likely to receive loans and they have higher incomes. This hints at longer-standing issues facing minority or poor communities that historically have had less access to credit. Additionally, change is not just about race and ethnicity; social class and access to capital matters as well.

There is a lot to consider here and to follow up on with more data, analysis, and interpretation.