1d piecewise smooth map: exploring a model of investment dynamics under financial frictions with three types of investment projects

• Дата: 2024
• Автори: Sushko, Iryna, Gardini, Laura, Matsuyama, Kiminori
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Institute of Mathematics, NAS of Ukraine 2024
• Онлайн доступ: https://umj.imath.kiev.ua/index.php/umj/article/view/7721
• Назва журналу: Ukrains’kyi Matematychnyi Zhurnal

UDC 517.9 We consider a 1D continuous piecewise smooth map, which depends on seven parameters. Depending on the values of parameters, it may have up to six branches. This map was proposed by Matsuyama [Theor. Econ., 8, 623–651 (2013); Section 5].  It describes the macroeconomic dynamics of investment and credit fluctuations in which three types of investment projects compete in the financial market.  We introduce a partitioning of the parameter space according to different branch configurations of the map and illustrate this partitioning for a specific parameter setting.  Then we present an example of the bifurcation structure in a parameter plane, which includes periodicity regions related to superstable cycles. Several bifurcation curves are obtained analytically, in particular, the border-collision bifurcation curves of  fixed points. We show that the intersection point of two  curves of this kind is an organizing center from which infinitely many other bifurcation curves are originated.