空间权重矩阵的设定方法研究

Research on the Specification Methods of Spatial Weight Matrix

空间权重矩阵作为实际观测数据到空间计量模型的映射,使得空间溢出效应的量化成为可能,是当前计量经济学的研究热点。空间权重矩阵设定方法的研究逻辑是首先对外生构建的空间权重矩阵基于邻接关系和距离函数进行分类研究,针对不同结构的空间单元进行多种设定方法的适用性分析,进而讨论利用Voronoi图构建离散点空间权重矩阵的应用方法。研究发现,实证分析中应针对具体问题和不同的空间单元,设定多个空间权重矩阵,并进一步检测不同设定方法对模型估计结果的影响以及不同形式矩阵的敏感性。

As the projection from actual observational data to spatial econometric models, spatial weight matrices have made quantifying the spillover effects possible which is also the research focus now. The paper firstly researches exogenously constructed spatial weight matrices based on adjacency and distance functions, analyzes the applicability of multiple methods for spatial units with different structures and discusses the application of Voronoi diagram to the construction of discrete points spatial weight matrix. It is found that multiple spatial weights matrixes should be set up for specific problems and different spatial units in the empirical analysis. The influence of different setting methods on model estimation results and the sensitivity of different matrices should be further examined.