4Dean Judith M., K.C. Fung, Zhi Wang. Measuring the Vertical Specializationin Chinese Trade[R]. Office of Economics Working Paper No. 2007-01-A, U.S.International Trade Commission,2007.
5Robert Koopman, Zhi Wang. How Much of Chinese Exports Is Really Made in China? Assessing Foreign and Domestic Yalue-Added in Gross Exports[R]. Office of Economics Working Paner. No. 2008-03-B. U.S.International Trade Commission.