An integrated mathematical model for the evolution of urban structure and population ist presented. The city configuration consists of an occupation number representation of different kinds of buildings such as lodgings and factories distributed over a grid of plots, and the population...

The possibility of co-movements in the cyclical variations of aggregate output in different countries has received increasing attention in recent years. The present paper derives sufficient conditions for the occurrence of persistent co-movements in the mean processes of aggregate economic...

We present a dynamic model of price setting in which price adjustments are costly for the monopolist. The general price level changes endogenously due to welfare changes. For the resulting two-dimensional dynamical system the existence of a continuum of stationary points is proven. Furthermore,...