http://www.foreignpolicy.com/node/373401
Rank City Rank by Population Rank by GDP
1 New York 6 2
2 London 28 5
3 Tokyo 1 1
4 Paris 20 6
5 Hong Kong 31 14
6 Chicago 25 4
7 Los Angeles 12 3
8 Singapore 38 23
9 Sydney 43 24
10 Seoul 22 19
11 Brussels 54 48
12 San Francisco 46 16
13 Washington 42 10
14 Toronto 36 20
15
