"As China's export juggernaut employs many imported inputs, there are many policy questions for which it is crucial to know the extent of domestic and foreign value added in its exports. The best known approach - the concept of "vertical specialization" proposed by Hummels, Ishii and Yi (2001) -...

This paper proposes a general method to extend a standard input-output (IO) table to incorporate firm heterogeneity when portraying the domestic segment of global value chains in a country. We develop a quadratic optimization model to estimate an extended IO table that reports inter-sector...