VAIM: value added imports, in 4 dimensions(import regions, source sectors, source regions, years).
Notation: the import region is where value added is finally absorbed in, it is also the destination region in VAEX.In ADBMRIO 2022, there are 35 sectors and 63 regions. In addition to the 35 sectors, there are 5 aggregated levels results (Total, goods, manufacture, all service and some services related to production).