英文标题：
《Cities and space: Common power laws and spatial fractal structures》
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作者：
Tomoya Mori, Tony E. Smith, Wen-Tai Hsu
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最新提交年份：
2019
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英文摘要：
  City size distributions are known to be well approximated by power laws across a wide range of countries. But such distributions are also meaningful at other spatial scales, such as within certain regions of a country. Using data from China, France, Germany, India, Japan, and the US, we first document that large cities are significantly more spaced out than would be expected by chance alone. We next construct spatial hierarchies for countries by first partitioning geographic space using a given number of their largest cities as cell centers, and then continuing this partitioning procedure within each cell recursively. We find that city size distributions in different parts of these spatial hierarchies exhibit power laws that are again far more similar than would be expected by chance alone -- suggesting the existence of a spatial fractal structure.
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中文摘要：
众所周知，许多国家的城市规模分布都很接近幂律。但这种分布在其他空间尺度上也有意义，例如在一个国家的某些区域内。利用来自中国、法国、德国、印度、日本和美国的数据，我们首先证明了大城市的空间分布远远超出了人们的预期。接下来，我们构建国家的空间层次结构，首先使用给定数量的最大城市作为单元中心对地理空间进行分区，然后在每个单元内递归地继续此分区过程。我们发现，在这些空间层次结构的不同部分，城市规模分布所表现出的幂律再次远比偶然发现的更为相似，这表明了空间分形结构的存在。
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分类信息：

一级分类：Economics        经济学
二级分类：General Economics        一般经济学
分类描述：General methodological, applied, and empirical contributions to economics.
对经济学的一般方法、应用和经验贡献。
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一级分类：Quantitative Finance        数量金融学
二级分类：Economics        经济学
分类描述：q-fin.EC is an alias for econ.GN. Economics, including micro and macro economics, international economics, theory of the firm, labor economics, and other economic topics outside finance
q-fin.ec是econ.gn的别名。经济学，包括微观和宏观经济学、国际经济学、企业理论、劳动经济学和其他金融以外的经济专题
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