The structure of borders in a small world.

Territorial subdivisions and geographic borders are essential for understanding phenomena in sociology, political science, history, and economics. They influence the interregional flow of information and cross-border trade and affect the diffusion of innovation and technology. However, it is unclear...

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Autores principales:	Christian Thiemann, Fabian Theis, Daniel Grady, Rafael Brune, Dirk Brockmann
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2010
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a206cf4730344016be83a206cbdacdfb
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spelling	oai:doaj.org-article:a206cf4730344016be83a206cbdacdfb2021-11-18T07:36:43ZThe structure of borders in a small world.1932-620310.1371/journal.pone.0015422https://doaj.org/article/a206cf4730344016be83a206cbdacdfb2010-11-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21124970/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Territorial subdivisions and geographic borders are essential for understanding phenomena in sociology, political science, history, and economics. They influence the interregional flow of information and cross-border trade and affect the diffusion of innovation and technology. However, it is unclear if existing administrative subdivisions that typically evolved decades ago still reflect the most plausible organizational structure of today. The complexity of modern human communication, the ease of long-distance movement, and increased interaction across political borders complicate the operational definition and assessment of geographic borders that optimally reflect the multi-scale nature of today's human connectivity patterns. What border structures emerge directly from the interplay of scales in human interactions is an open question. Based on a massive proxy dataset, we analyze a multi-scale human mobility network and compute effective geographic borders inherent to human mobility patterns in the United States. We propose two computational techniques for extracting these borders and for quantifying their strength. We find that effective borders only partially overlap with existing administrative borders, and show that some of the strongest mobility borders exist in unexpected regions. We show that the observed structures cannot be generated by gravity models for human traffic. Finally, we introduce the concept of link significance that clarifies the observed structure of effective borders. Our approach represents a novel type of quantitative, comparative analysis framework for spatially embedded multi-scale interaction networks in general and may yield important insight into a multitude of spatiotemporal phenomena generated by human activity.Christian ThiemannFabian TheisDaniel GradyRafael BruneDirk BrockmannPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 11, p e15422 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christian Thiemann Fabian Theis Daniel Grady Rafael Brune Dirk Brockmann The structure of borders in a small world.
description	Territorial subdivisions and geographic borders are essential for understanding phenomena in sociology, political science, history, and economics. They influence the interregional flow of information and cross-border trade and affect the diffusion of innovation and technology. However, it is unclear if existing administrative subdivisions that typically evolved decades ago still reflect the most plausible organizational structure of today. The complexity of modern human communication, the ease of long-distance movement, and increased interaction across political borders complicate the operational definition and assessment of geographic borders that optimally reflect the multi-scale nature of today's human connectivity patterns. What border structures emerge directly from the interplay of scales in human interactions is an open question. Based on a massive proxy dataset, we analyze a multi-scale human mobility network and compute effective geographic borders inherent to human mobility patterns in the United States. We propose two computational techniques for extracting these borders and for quantifying their strength. We find that effective borders only partially overlap with existing administrative borders, and show that some of the strongest mobility borders exist in unexpected regions. We show that the observed structures cannot be generated by gravity models for human traffic. Finally, we introduce the concept of link significance that clarifies the observed structure of effective borders. Our approach represents a novel type of quantitative, comparative analysis framework for spatially embedded multi-scale interaction networks in general and may yield important insight into a multitude of spatiotemporal phenomena generated by human activity.
format	article
author	Christian Thiemann Fabian Theis Daniel Grady Rafael Brune Dirk Brockmann
author_facet	Christian Thiemann Fabian Theis Daniel Grady Rafael Brune Dirk Brockmann
author_sort	Christian Thiemann
title	The structure of borders in a small world.
title_short	The structure of borders in a small world.
title_full	The structure of borders in a small world.
title_fullStr	The structure of borders in a small world.
title_full_unstemmed	The structure of borders in a small world.
title_sort	structure of borders in a small world.
publisher	Public Library of Science (PLoS)
publishDate	2010
url	https://doaj.org/article/a206cf4730344016be83a206cbdacdfb
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The structure of borders in a small world.

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