In order to evaluate how the FVG port system interacts with the remaining sectors of the economy, a bi-regional I-O model has been built. Since such a model was not available, a five-sector bi-regional model, for the regions of FVG and OIRs, was initially constructed (for the details of the methodology used cf. Danielis, 2011, p. 93). These five sectors are: primary and secondary manufacturing, transport,