考虑反馈作用的投入产出价格影响模型

Input-output price impact model with consideration of feedback mechanism

投入产出价格影响模型的隐含假定为:价格发生初始变化的部门的价格由系统之外的因素外生决定,不会受到其他部门价格变化的反馈影响.这一假定很多情况下不符合经济实际,因此,针对这一假定,提出了考虑反馈作用的投入产出价格影响模型,证明了模型存在有经济意义的解,并给出了算例,对比分析考虑反馈作用的投入产出价格影响模型与不考虑反馈作用的模型在计算结果上的差异.

The input-output price impact model has an implicit presumption, that is, to suppose that in an economic system~ the prices of the sectors with primary price changes are determined exogenously, and not affected by other sectors. It means that when using the model, the feedback mechanism is not taken into consideration. On most occasions, this does not satisfy the economic reality. According to the assumption, this paper gives an improved input-output price impact model with consideration of feedback mechanism, and proves that the improved model has solutions with economic significance. At last, two examples are given to show the differences of the models with and without consideration of feedback mechanism in practical computation.