As Middle class disappears - Community advantages disappear
"Research shows..., that residential sorting by income has significantly increased over the past 45 years.1 This sorting has resulted in more Americans living in communities that represent the poles of the income distribution rather than the middle. In 1970, two-thirds of families in large metropolitan areas lived in middle-income neighborhoods. By 2012, just 40 percent of families lived in such neighborhoods.
Similarly, the percentage of families living in affluent or poor neighborhoods more than doubled from 15 percent to 34 percent over that same time period.2 This pattern is particularly problematic for lower income individuals. The most recent American Community Survey data show that approximately 12 percent of all poor individuals, and nearly a quarter of poor individuals in urban areas, live in distressed neighborhoods, defined as census tracts with poverty rates greater than 40 percent. This means that more than five million Americans face the double disadvantage of individual and contextual poverty.3"
Article focus is on how residential context plays a significant role in access to education and other public services, opportunities for social interactions, labor market prospects, the frequency and nature of encounters with the police, and the freedom enabled by ones real or perceived physical safety.
http://equitablegrowth.org/human-capital/geography-of-economic-inequality/