Switching Regimes in Economics: The Contraction Mapping and the ω-Limit Set

• 作者: Pascal Stiefenhofer Peter Giesl
• 来源期刊: 应用数学(英文)
• 学科: 数学
• 关键词: NON-SMOOTH Periodic ORBIT Differential Equation CONTRACTION Mapping Economic Regimes NON-SMOOTH DYNAMICAL System
• 年，卷（期）: 2019,（7）
• 页码范围: 513-520
• 页数: 8页
• 分类号: O1

摘要

This paper considers a dynamical system defined by a set of ordinary autonomous differential equations with discontinuous right-hand side. Such systems typically appear in economic modelling where there are two or more regimes with a switching between them. Switching between regimes may be a consequence of market forces or deliberately forced in form of policy implementation. Stiefenhofer and Giesl [1] introduce such a model. The purpose of this paper is to show that a metric function defined between two adjacent trajectories contracts in forward time leading to exponentially asymptotically stability of (non)smooth periodic orbits. Hence, we define a local contraction function and distribute it over the smooth and nonsmooth parts of the periodic orbits. The paper shows exponentially asymptotical stability of a periodic orbit using a contraction property of the distance function between two adjacent nonsmooth trajectories over the entire periodic orbit. Moreover it is shown that the ω-limit set of the (non)smooth periodic orbit for two adjacent initial conditions is the same.