In this paper we analyze the bipartite network of countries and products from UN data on country production. We define the country-country and product-product projected networks and introduce a novel method of filtering information based on elements' similarity. As a result we find that country clustering reveals unexpected socio-geographic links among the most competing countries. On the same footings the products clustering can be efficiently used for a bottom-up classification of produced goods. Furthermore we mathematically reformulate the "reflections method" introduced by Hidalgo and Hausmann as a fixpoint problem; such formulation highlights some conceptual weaknesses of the approach. To overcome such an issue, we introduce an alternative methodology (based on biased Markov chains) that allows to rank countries in a conceptually consistent way. Our analysis uncovers a strong non-linear interaction between the diversification of a country and the ubiquity of its products, thus suggesting the possible need of moving towards more efficient and direct non-linear fixpoint algorithms to rank countries and products in the global market. © 2012 Caldarelli et al.

A Network Analysis of Countries' Export Flows: Firm Grounds for the Building Blocks of the Economy / Guido, Caldarelli; Cristelli, Matthieu; Andrea, Gabrielli; Pietronero, Luciano; Antonio, Scala; Tacchella, Andrea. - In: PLOS ONE. - ISSN 1932-6203. - ELETTRONICO. - 7:10(2012), p. e47278. [10.1371/journal.pone.0047278]

A Network Analysis of Countries' Export Flows: Firm Grounds for the Building Blocks of the Economy

CRISTELLI, MATTHIEU;PIETRONERO, Luciano;TACCHELLA, ANDREA
2012

Abstract

In this paper we analyze the bipartite network of countries and products from UN data on country production. We define the country-country and product-product projected networks and introduce a novel method of filtering information based on elements' similarity. As a result we find that country clustering reveals unexpected socio-geographic links among the most competing countries. On the same footings the products clustering can be efficiently used for a bottom-up classification of produced goods. Furthermore we mathematically reformulate the "reflections method" introduced by Hidalgo and Hausmann as a fixpoint problem; such formulation highlights some conceptual weaknesses of the approach. To overcome such an issue, we introduce an alternative methodology (based on biased Markov chains) that allows to rank countries in a conceptually consistent way. Our analysis uncovers a strong non-linear interaction between the diversification of a country and the ubiquity of its products, thus suggesting the possible need of moving towards more efficient and direct non-linear fixpoint algorithms to rank countries and products in the global market. © 2012 Caldarelli et al.
2012
complexity; dynamics; evolution; finance; markets; systems
01 Pubblicazione su rivista::01a Articolo in rivista
A Network Analysis of Countries' Export Flows: Firm Grounds for the Building Blocks of the Economy / Guido, Caldarelli; Cristelli, Matthieu; Andrea, Gabrielli; Pietronero, Luciano; Antonio, Scala; Tacchella, Andrea. - In: PLOS ONE. - ISSN 1932-6203. - ELETTRONICO. - 7:10(2012), p. e47278. [10.1371/journal.pone.0047278]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/515873
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