the most economically powerful cities

1) London, England.
GDP: 452 billion. population: 8,567,000.
2) Hong Kong, China.
GDP: 244 billion. population: 7,206,000.
3) New York, USA.
GDP: 1.13 trillion. population: 19,040,000.
4) Tokyo, Japan.
GDP: 1.19 trillion. population: 35,676,000.
5) Chicago, USA.
GDP: 460 billion. population: 8,990,000.
6) Seoul, Korea.
GDP: 218 billion. population: 9,796,000.
7) Paris, France.
GDP: 460 billion. population: 9,904,000.
8) Los Angeles, USA.
GDP: 639 billion. population: 12,500,000.
9) Shanghai, China.
GDP: 139 million. population: 14,987,000.
10) Toronto, Canada.
GDP: 209 billion. population: 5,213,000.

From Forbes.com