Paul Krugman has done a rough, on the back of a napkin calculation on the cost of jobs due to Chinese Mercantilism alone.

if we think of the United States as bearing a proportionate share, and also use the rule of thumb that one point of GDP = 1 million jobs, we’re looking at 1.4 million U.S. jobs lost due to Chinese mercantilism.

Bear in mind this is not a formal result, simply a very rough estimate put forth on his blog for discussion, not a formal research paper.

A couple of IMF researchers estimated China accounts for 0.9% of GWP (gross world product).

Since China's GDP is heavily export driven, Krugman asserts one can look at this as a negative impact on world exports., which in turn, negatively impacts purchases of goods and services from U.S. providers and this is a multiplier effect.