[The dynamics of multi-regional demographic systems--the case of a nonlinear migration model].

"To provide new insight into the evolution of multiregional population systems, this article presents a dynamic study of a nonlinear variant of the components-of-change model. In this variant, migrants out of a region do not distribute themselves among destination regions in constant proportions (as in the classical linear variant). Rather their allocation is proportional to that of population (weighted so as to account for the difficulty to move between regions). The analysis focuses on the existence, characteristics, and determination of equilibrium states. It is illustrated with an application to the population of Canada and its five large regions." (summary in ENG)