Widespread Suburbanization

Here is some interesting demographic/geographic science from New Geography concerning the continuing process of suburbanization in many places around the world. Conversely, it can be seen as the pooling of the poor in older urban centers.

One place where this doesn't seem to much happen is in France. In France the affluent prefer to live in the city and their bidding up the prices of urban dwellings drives the poor out to suburbs called banlieues. As always, the French march to their own eccentric drummer.