Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2003-12-09
Physics
Condensed Matter
Statistical Mechanics
4 pages, 2 .eps figures
Scientific paper
10.1103/PhysRevE.70.027102
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.
Caldarelli Guido
Coccetti Fabrizio
Los Rios Paolo de
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