Measuring value circulation in regional chains

Since Hummels, Ishii and Ye (2001) seminal work there have been lots of proposals for measuring participation in global value chains with input-output tables. Conjointly to the development of measures, several projects created Inter-Country Input-output tables. To the extent that integrating data of different origins requires strong assumptions and confidence in sources, some projects keep more detailed inter country input-output tables at a regional level. In this paper I adapt two of the most complete methods conceived for global Input-output tables to the case of regional tables, and I use them to analyze the intraregional value chain trade of South America. Besides characterizing the trade in this region, this paper identifies and asses the differences between adaptations of Borin and Mancini (2019) source-based decomposition of gross exports and the Wang, Wei and Zhu (2018) method.