David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
Learn more about PhilPapers
Kazuko Yamasaki, Kaushik Matia, Fabio Pammolli, Sergey Buldyrev, Massimo Riccaboni, H. Eugene Stanley & Dongfeng Fu
Complex systems can be characterized by classes of equivalency of their elements defined according to system specific rules. We propose a generalized preferential attachment model to describe the class size distribution. The model postulates preferential growth of the existing classes and the steady influx of new classes. According to the model, the distribution changes from a pure exponential form for zero influx of new classes to a power law with an exponential cut-off form when the influx of new classes is substantial. Predictions of the model are tested through the analysis of a unique industrial database, which covers both elementary units (products) and classes (markets, firms) in a given industry (pharmaceuticals), covering the entire size distribution. The model's predictions are in good agreement with the data. The paper sheds light on the emergence of the exponent tau approximately 2 observed as a universal feature of many biological, social and economic problems.
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library||
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
Stanley Burris (1984). Model Companions for Finitely Generated Universal Horn Classes. Journal of Symbolic Logic 49 (1):68-74.
Maqbool Ahmed, Indications of de Sitter Spacetime From Classical Sequential Growth Dynamics of Causal Sets.
Richard Laing (1974). Maxwell's Demon and Computation. Philosophy of Science 41 (2):171-178.
Victor M. Yakovenko & J. Barkley Rosser, Colloquium: Statistical Mechanics of Money, Wealth, and Income.
Michael H. Albert (1987). A Preservation Theorem for EC-Structures with Applications. Journal of Symbolic Logic 52 (3):779-785.
Arnon Avron & Iddo Lev (2001). A Formula-Preferential Base for Paraconsistent and Plausible Reasoning Systems. In Proceedings of the Workshop on Inconsistency in Data and Knowledge. 60-70.
John L. Bell (2000). Sets and Classes as Many. Journal of Philosophical Logic 29 (6):585-601.
Zhaohui Zhu, Zhenghua Pan, Shifu Chen & Wujia Zhu (2002). Valuation Structure. Journal of Symbolic Logic 67 (1):1-23.
Added to index2009-01-28
Total downloads4 ( #288,749 of 1,410,009 )
Recent downloads (6 months)1 ( #177,059 of 1,410,009 )
How can I increase my downloads?