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Preferential exchange: strengthening connections in complex networks

Caldarelli, Guido and Coccetti, Fabrizio and De Los Rios, Paolo Preferential exchange: strengthening connections in complex networks. Physical Review E, 70 (2). ISSN 1539-3755 (2004)

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Many social, technological, and biological interactions involve network relationships whose outcome intimately depends on the structure of the network and on the strengths of the connections. Yet, although much information is now available concerning the structure of many networks, the strengths are more difficult to measure. Here we show that, for one particular social network, notably the e-mail network, a suitable measure of the strength of the connections can be available. We also propose a simple mechanism, based on positive feedback and reciprocity, that can explain the observed behavior and that hints toward specific dynamics of formation and reinforcement of network connections. Network data from contexts different from social sciences indicate that power-law, and generally broad, distributions of the connection strength are ubiquitous, and the proposed mechanism has a wide range of applicability.

Item Type: Article
Identification Number: 10.1103/PhysRevE.70.027102
Uncontrolled Keywords: PACS: 89.75.Hc, 05.65.+b
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Q Science > QC Physics
Research Area: Economics and Institutional Change
Depositing User: Ms T. Iannizzi
Date Deposited: 14 Feb 2012 14:36
Last Modified: 21 Nov 2013 09:03
URI: http://eprints.imtlucca.it/id/eprint/1121

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