Cluster Expansion Method for Evolving Weighted Networks Having Vector-Like Nodes

• Authors: M. Ausloos , M. Gligor
• Languages of publication: EN

Abstracts

EN

The cluster variation method known in statistical mechanics and condensed matter is revived for weighted bipartite networks. The decomposition (or expansion) of a Hamiltonian through a finite number of components, whence serving to define variable clusters, is recalled. As an illustration the network built from data representing correlations between (4) macroeconomic features, i.e. the so-called vector components, of 15 EU countries, as (function) nodes, is discussed. We show that statistical physics principles, like the maximum entropy criterion points to clusters, here in a (4) variable phase space: Gross Domestic Product, Final Consumption Expenditure, Gross Capital Formation and Net Exports. It is observed that the maximum entropy corresponds to a cluster which does not explicitly include the Gross Domestic Product but only the other (3) "axes", i.e. consumption, investment and trade components. On the other hand, the minimal entropy clustering scheme is obtained from a coupling necessarily including Gross Domestic Product and Final Consumption Expenditure. The results confirm intuitive economic theory and practice expectations at least as regards geographical connexions. The technique can of course be applied to many other cases in the physics of socio-economy networks.

Keywords

EN

89.75.Fb; 89.65.Gh; 89.75.Hc; 87.23.Ge

Discipline

• 87.23.Ge: Dynamics of social systems
• 89.75.Hc: Networks and genealogical trees
• 89.65.Gh: Economics; econophysics, financial markets, business and management(for economic issues regarding production and use of renewable energy, see 88.05.Lg)
• 89.75.Fb: Structures and organization in complex systems

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 3
• Pages: 491-499

Dates

published

2008-09

received

2007-11-22

Contributors

author

M. Ausloos

• GRAPES, SUPRATECS, U.Lg, B5a Sart-Tilman, B-4000 Liège, Belgium

author

M. Gligor

• National College Roman, Voda Roman-5550, Neamt, Romania

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Identifiers

DOI

10.12693/APhysPolA.114.491