[memph]

If a suburb is able to maintain its relative income, that's actually really good by the way. Typically what happens is something like this.


Inner City
Before: $40,000 income, 1.0 million people
After: $30,000 income, 0.7 million people

Inner suburbs
Before: $80,000 income, 2.0 million people
After: $65,000 income, 2.0 million people

Outer suburbs
Before: $100,000 income, 0.31 million people
After: $80,000 income, 1.0 million people

Overall
Before: $69,789 income, 3.31 million people
After: $69,789 income, 3.70 million people

So that's an example of how it's possible for every part of the metro area to be declining in income but the metro area as a whole is still has a stable overall average income, because the population growth is in the highest income area and the population decline is in the lowest income area.