New research shows a steady increase in the extent to which Americans are geographically divided by income. The below charts are from a paper by Kendra Bischoff and Sean Reardon, professors at Cornell and Stanford respectively, on what they refer to as "residential segregation by income". (h/t to Kevin Drum)
They find a shrinking number of Americans live in middle class neighborhoods, and a growing number of people living in poor, affluent, or high income areas.
Drum worries the trend means that the "well-off have less and less interaction with the poor outside of the market economy, and less and less empathy for how they live their lives."
The researchers also found a marked increase in family income segregation by race.
Bischoff and Reardon discuss the impact of black and Hispanc families living in increasingly income-segregated neighborhoods: