Shifting Population

Writing for City Journal, Mario Polese argues that big cities are more important than ever, and backs up his argument with seven reasons they're luring people, from economies of scale to falling transportation and communication costs.

The American Enterprise Institute looks closely at how migration patterns have changed state-by-state through the last couple of years of recession.

Author Alan Ehrenhalt says that conditions are ripe for the permanent return of downtown residential neighborhoods, and that a "demographic inversion" has already begun in Manhattan, Chicago and Washington, DC, among other cities.

The urban shift in demographics is not just a problem for planners.