Regarding files in 'raw_z_zm' zip package
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The 1360 text files in the 'raw_z_zm.zip' package contain intra- and inter-sectorial flows
for all 40 countries and 17 years. This data is extracted directly from the national Input-
Output accounts in the WIOD13 database, which is available here (under National IO tables):
https://www.rug.nl/ggdc/valuechain/wiod/wiod-2013-release

These data files are included in this repository with permission from Groningen Growth
and Development Centre (GGDC) and is distributed under the CC BY 4.0 license:
https://creativecommons.org/licenses/by/4.0/

Each file contains a tab-separated matrix where row- and column headers correspond to
the 34 sectors. The files [COUNTRY]_[YEAR]_Z.txt contain intermediate domestic flows,
and the files [COUNTRY]_[YEAR]_ZM.txt contains intermediate domestic flows where foreign
sectorial input is added on top (i.e. the Z and M matrices added together).

This zip package also contains example R code for extracting structural fingerprints for
each country-year, using the ZM and Z matrices for up- and downstream sectorial
prominences.