Formation of hub cities: Transportation cost advantage and population agglomeration

Many cities are located on rivers or coasts. Such cities developed as transportation hubs or markets for interregional trade, since these locations provide better access to other regions. Local products are collected at such hubs, and interregional trade then takes place among these transportation hubs. As the volume of trade between hubs increases, more workers are needed in order to meet labor demand for shipping and handling commodities, resulting in population agglomeration at such hubs. Formalizing the mechanism described above, this paper constructs a simple three location general equilibrium model, in which transportation hubs and population agglomeration emerge endogenously. (C) 2000 Academic Press.