Global spatio-temporal patterns in human migration: a complex network perspective.

Global spatio-temporal patterns in human migration: a complex network perspective.
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DOI:
10.1371/journal.pone.0053723
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Ridolfi L
Ridolfi L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Davis KF;D'Odorico P;Laio F;Ridolfi L

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移民是人类克服困难和追求更好生活质量的一种强大的适应性战略。作为促进思想、文化、金钱和商品交流的普遍工具,国际移徙是全球化的主要贡献者。全球移徙由通过人类流动的多种联系联系起来的国家组成,构成了一个网络。尽管人类移徙在连接世界不同地区的不同社区方面发挥了重要作用,但国际移徙网络的拓扑结构和行为及其随时间的变化仍然知之甚少。在这里,我们表明,全球人类移徙网络在20世纪后半叶变得更加相互联系,移徙目的地的选择在一定程度上反映了殖民和后殖民历史、语言、宗教和距离。从1960年到2000年,我们发现网络传递性(即连接到同一节点的节点之间的连通性)稳步增加,平均路径长度减少,度分布向上移动,所有这些都加强了迁移网络的小世界行为。此外,我们发现,不同的国家群体主要根据历史、文化和经济因素优先互动,形成移民社区。
Migration is a powerful adaptive strategy for humans to navigate hardship and pursue a better quality of life. As a universal vehicle facilitating exchanges of ideas, culture, money and goods, international migration is a major contributor to globalization. Consisting of countries linked by multiple connections of human movements, global migration constitutes a network. Despite the important role of human migration in connecting various communities in different parts of the world, the topology and behavior of the international migration network and its changes through time remain poorly understood. Here we show that the global human migration network became more interconnected during the latter half of the twentieth century and that migrant destination choice partly reflects colonial and postcolonial histories, language, religion, and distances. From 1960 to 2000 we found a steady increase in network transitivity (i.e. connectivity between nodes connected to the same node), a decrease in average path length and an upward shift in degree distribution, all of which strengthened the ‘small-world’ behavior of the migration network. Furthermore, we found that distinct groups of countries preferentially interact to form migration communities based largely on historical, cultural and economic factors.
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