Fig. 1
From: Relaxing the import proportionality assumption in multi-regional input–output modelling
A simplified MRIO system with four regions, four industries and two final demand categories to exemplify how the import matrix \({\mathbf {T}}^{si}\) is extracted from the inter-industry matrix \({\mathbf {Z}}\) and the final demand matrix \({\mathbf {Y}}\)