测度长三角制造业同构的几种方法——基于时间序列数据的分析

Methods Measuring to the Same Structure of Manufacturing in Delta Area of Changjiang River——Analyzing Based on Time Serial Datum

在借鉴相关研究的基础上,本文提出了测度制造业同构的两个指数:改进克鲁格曼指数MKIij和结构重合度指数SSIij,并证明了二者的等价性。同时对结构相似系数Sij与结构重合度指数SSIij的含义进行了剖析,指出用SSIij来衡量地区间制造业的同构度更为贴切。利用Sij和SSIij测度了长三角制造业的同构度,结果表明长三角两省一市制造业的结构相似度高于结构重合度,但研究同时表明,用他们的动态变化来反映制造业结构是否发生了趋同却具有同样的效果。

Two indexes, modified Krugman index（MKIij ）and structural superposition index（ SSIij）, that can measure to the structural superposition of manufacturing were put forward based on interrelated study. Their equivalence were proved. Meanings of similar coefficient of structure（ Sij）and structural superposition index（ SSIij ）were analyzed. It is shows that SSIij was more appropriate than Sij to measure the degree of same structure of manufacturing. The degree of same structure of manufacturing in delta area of Changjiang river were measured by using the Sij and SSIij. The results indicated that the degree of similarity was bigger than the degree of superposition and their differences were remarkable, whereas, the results of measurement to the structural convergence by using the Sij and SSIij were same.