The current century has the dubious distinction of being an ‘urban century’. More than half the population of the world live in cities; cities are growing much faster than national population growth rates; and most of the ‘global’ problems that we are facing have their starting points and precedences in very urban settings.
Going beyond size alone, or contribution to GDP, the Global Cities Ranking looks at how much a city influences what goes on away from its boundaries – markets, cultures, innovation etc. It covered a city’s business activity, human capital, and information exchange to its cultural experience and political engagement. The 2010 Global Cities Index was created as a collaboration between Foreign Policy, management consulting firm A.T. Kearney, and The Chicago Council on Global Affairs.
See the full ranking and further details at: http://www.foreignpolicy.com/articles/2010/08/11/the_global_cities_index_2010