动态IS-LM模型及稳定性分析

IS-LM模型是描述产品市场和货币市场之间相互联系的理论结构．以往的研究大都运用比较静态的方法分析模型中的一个或多个外生变量或参数发生变化时，均衡收入与均衡率的变化规律．这种方法很难对均衡状态之外的系统状况进行真正的动态分析．文中利用萨缪尔森乘数加速数模型将IS-LM模型动态化，对动态的IS-LM模型进行稳定性分析．并与萨缪尔森乘数加速数模型进行比较．从而，证实动态的IS-LM模型更符合现实的经济运行情况．

Stability Analysis of Dynamic IS-LM Model

IS-LM model is a theoretical structure describing interrelation between product market and curreney market. In previous studies, a relatively static method is mostly used in analysing law of the change of equilibrium income and equilibrium rate when one or multiple exogenous variables or parmeters in the model change. This method is difficult to carry out a true dynamic analysis of system status beyond equilibrium state. The authors make IS-LM model to be dynamic by using Samuelson's multiplicator-accelerator model; and then, carry out stability analysis of dynamic IS-LM model and compare it with Samuelson's multiplicato-accelerator model. The dynamic IS-LM model is proved to be in even more conformity with the actual situation of economic performance.