"... the Chinese trade surplus from its export to the United States has a quadrupling effect on added US gross domestic product (GDP). In other words, for every dollar of US trade deficit in favor of China, the US economy registers $4 of additional GDP in value-adding services, such as marketing, distribution and retail markup, trade and consumer financing, etc."
Source: http://www.atimes.com/atimes/global_economy/EA10Dj01.html
