Classifying Industries into Types of Relative Concentration
提出一种新统计方法，基于两个Goodman-Kruskal秩相关系数，将每个行业归入六种地理模式之一，涵盖从城市集中到强农村集中的五种集中类型，并用德国613个行业在412个地区的就业数据展示其效果。
Summary Existing measures of relative concentration rank industries according to their degree of concentration. However, two equally strongly concentrated industries can have completely different types of concentration. Therefore, the paper proposes a new statistical approach that classifies each industry into one of six different geographical patterns, five of which represent different types of concentration, ranging from urban concentration to strongly rural concentration. The statistical identification of each industry's geographical pattern is based on two Goodman–Kruskal rank correlation coefficients. The power of this new approach is illustrated by using German employment data on 613 different industries in 412 regions.