Abstract
This paper proposes a complete dynamic model of a system of metropolitan areas interacting through economic and demographic links, namely trade and migration respectively. It not only considers interregional effects (through an interregional input–output submodel) but also intraregional effects (through a set of Garin–Lowry submodels). In addition it allows the simultaneous determination of migration rates, labor-force-participation rates, and unemployment rates. Suggestive of the demoeconomic approach, this model also reveals the methodological difficulties that such an approach implies.