现有空间结构分解模型存在测算结果不唯一及不满足传递性两大问题。本文提出了一种基于最小生成树理论的空间结构分解模型,在保证多个地区间比较传递性的同时,减小了结构分解模型测算结果不唯一性对模型应用的影响。基于我国地区投入产出袁,本文以ICT产业区住商比较的五变量结构分解为例,示范了如何定义帕式-拉式偏离指数(PLS),建立了基于PLS指数的最小生成树,并将结论应用于空间结构分解,对该模型的有效性进行了验证。
The non - uniqueness and non- transitivity are two of the biggest problems to hamper the application of spatial structural decomposition model. In this paper, we propose a new spatial structural decomposition model combining minimum spanning tree to deal with these problems. From the empirical part, using regional input - output tables of China, we show the process how to decompose differences of location quotients in ICT industry across provinces based on our model. The process includes definition of Paasche - Laspeyres spread, generation of cor- responding minimum spanning tree and test of the model's validity.