The Structure and Growth of Weighted Networks

Details The Structure and Growth of Weighted Networks The Structure and Growth of Weighted Networks

2009-08-03

arxiv.org/abs/0908.0348v3

Economy

Quantitative Finance

General Finance

Scientific paper

We develop a simple theoretical framework for the evolution of weighted networks that is consistent with a number of stylized features of real-world data. In our framework, the Barabasi-Albert model of network evolution is extended by assuming that link weights evolve according to a geometric Brownian motion. Our model is verified by means of simulations and real world trade data. We show that the model correctly predicts the intensity and growth distribution of links, the size-variance relationships of the growth of link weights, the relationship between the degree and strength of nodes, as well as the scale-free structure of the network.

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