4.1 Article

World population densities: convergence, stability, or divergence?

期刊

MATHEMATICAL POPULATION STUDIES
卷 29, 期 1, 页码 17-30

出版社

TAYLOR & FRANCIS INC
DOI: 10.1080/08898480.2020.1827854

关键词

Coefficient of variation; population density; relative variance; Taylor's law

向作者/读者索取更多资源

Taylor's law states that the variance of population density is a power function of its mean. The exponent determines the convergence or divergence of the density distribution over time. East Asia, the Pacific, and South Asia have an exponent of 2, indicating a stable distribution. Sub-Saharan Africa has an exponent greater than 2 due to ongoing demographic transition and intense urbanization. Other regions have an exponent lower than 2, indicating completed demographic transition and rural exodus.
Taylor's law states that the variance of population density in a given set of areas is a power function of its mean. When the exponent is equal to 2, the distribution of population densities between areas remains unchanged; when it is less than 2, the distribution converges toward the uniform distribution; when it is greater than 2, the densities become increasingly different from each other over time. The exponent takes the value 2 for East Asia, the Pacific, and South Asia. It takes a value greater than 2 for sub-Saharan Africa because the ongoing demographic transition and intense urbanization are redistributing the population over the territories. The exponent is lower than 2 for the other regions of the world, which have completed their demographic transition and where the rural exodus has been completed.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.1
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据