Saturday, May 14, 2011

concentration ratio

... the [US] national population is concentrated in metropolitan areas with roughly 84% of residents living in designated metro areas. In addition, 1 of every ten residents lived in either the New York or Los Angeles metro areas.

In Russia it is greater since Moscow (about 11 mln) and SPb (about 5) is about twelve per cent of a total 140, or about the same  

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