This study develops an overlapping generations model that involves the endogenous determination of demographic and city structure to fully analyze the social and natural changes in city populations. We provide conditions under which the model exhibits the spatial features of demography observed...

This paper analyzes the situation in which a national government introduces environmental regulations. Within the framework of an international duopoly with environmental regulations, an environmental tax imposed by the government in the home country can induce a foreign firm with advanced...

We investigate a mixed market where a state-owned welfare-maximizing public firm competes against profit-maximizing private firms. We use a circular city model with quantity-setting competition. In contrast to a pure market case discussed by Pal (1998a), spatial agglomeration of private firms...