Scale free is not rare in international trade networks

Abstract Failing to consider the strong correlations between weights and topological properties in capacity-weighted networks renders test results on the scale-free property unreliable. According to the preferential attachment mechanism, existing high-degree nodes normally attract new nodes. However...

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Autores principales:	Linqing Liu, Mengyun Shen, Chang Tan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3f7430249fb64304b2b2a854c6ae0098
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spelling	oai:doaj.org-article:3f7430249fb64304b2b2a854c6ae00982021-12-02T18:02:43ZScale free is not rare in international trade networks10.1038/s41598-021-92764-12045-2322https://doaj.org/article/3f7430249fb64304b2b2a854c6ae00982021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92764-1https://doaj.org/toc/2045-2322Abstract Failing to consider the strong correlations between weights and topological properties in capacity-weighted networks renders test results on the scale-free property unreliable. According to the preferential attachment mechanism, existing high-degree nodes normally attract new nodes. However, in capacity-weighted networks, the weights of existing edges increase as the network grows. We propose an optimized simplification method and apply it to international trade networks. Our study covers more than 1200 product categories annually from 1995 to 2018. We find that, on average, 38%, 38% and 69% of product networks in export, import and total trade are scale-free. Furthermore, the scale-free characteristics differ depending on the technology. Counter to expectations, the exports of high-technology products are distributed worldwide rather than concentrated in a few developed countries. Our research extends the scale-free exploration of capacity-weighted networks and demonstrates that choosing appropriate filtering methods can clarify the properties of complex networks.Linqing LiuMengyun ShenChang TanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Linqing Liu Mengyun Shen Chang Tan Scale free is not rare in international trade networks
description	Abstract Failing to consider the strong correlations between weights and topological properties in capacity-weighted networks renders test results on the scale-free property unreliable. According to the preferential attachment mechanism, existing high-degree nodes normally attract new nodes. However, in capacity-weighted networks, the weights of existing edges increase as the network grows. We propose an optimized simplification method and apply it to international trade networks. Our study covers more than 1200 product categories annually from 1995 to 2018. We find that, on average, 38%, 38% and 69% of product networks in export, import and total trade are scale-free. Furthermore, the scale-free characteristics differ depending on the technology. Counter to expectations, the exports of high-technology products are distributed worldwide rather than concentrated in a few developed countries. Our research extends the scale-free exploration of capacity-weighted networks and demonstrates that choosing appropriate filtering methods can clarify the properties of complex networks.
format	article
author	Linqing Liu Mengyun Shen Chang Tan
author_facet	Linqing Liu Mengyun Shen Chang Tan
author_sort	Linqing Liu
title	Scale free is not rare in international trade networks
title_short	Scale free is not rare in international trade networks
title_full	Scale free is not rare in international trade networks
title_fullStr	Scale free is not rare in international trade networks
title_full_unstemmed	Scale free is not rare in international trade networks
title_sort	scale free is not rare in international trade networks
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3f7430249fb64304b2b2a854c6ae0098
work_keys_str_mv	AT linqingliu scalefreeisnotrareininternationaltradenetworks AT mengyunshen scalefreeisnotrareininternationaltradenetworks AT changtan scalefreeisnotrareininternationaltradenetworks
_version_	1718378862484652032

Scale free is not rare in international trade networks

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