The Ten Richest Cities in 2020
"As global urbanisation continues apace - 2008 is the first year in history in which more than half of the world's population lives in towns and cities - figures compiled by PwC show which conurbations are expected to come out on top in terms of wealth and affluence over the next decade. The research looked at the world's top cities and ranked them by gross domestic product by using purchasing power parity exchange rates (the rate that gives you equal buying power in each country). It shows that the mega-cities of Tokyo and New York (with GDPs similar to that of Spain and Canada), lead the pack by a considerable margin."
Topping the list are Tokyo, New York, Los Angeles, London and Chicago.