Abstract
Unbalanced distribution of population, or mono-polar concentration, into the metropolitan area is the most serious issue in nationwide spatial planning. With the above background, this paper aims first, at showing a framework of modeling a system of cities and some examples of population distributions, or patterns of equilibrium geography. Then, the impact of transport investment under the mono-polar concentration is to be examined. For this purpose of the study, we build a socio-economic model within the framework of Walrasian multi-market equilibrium, and analyze the impact of transport investment on the population distribution and on the social welfare.
