PIB de grandes cidades americanas comparado a alguns países

The Brookings Institution, a think-tank, has assembled data on how America's metropolitan areas trade. It finds that America moved $20 trillion in merchandise in 2010, or more than 100% of GDP, if trade between cities is counted. The top 20 metros account for almost a third of the total. St Louis and Detroit are busier traders than the Netherlands, a famously seafaring nation http://econ.st/1aa5ob4