TY  - JOUR
N1  - © 2014 American Physical Society
ID  - eprints2278
VL  - 90
JF  - Physical Review E
UR  - http://link.aps.org/doi/10.1103/PhysRevE.90.022817
KW  - PACS number(s): 89.65.Gh
KW  -  89.75.Hc
Y1  - 2014/08//
AV  - public
TI  - Preferential attachment in multiple trade networks
N2  - In this paper we develop a model for the evolution of multiple networks which is able to replicate the concentrated and sparse nature of world trade data. Our model is an extension of the preferential attachment growth model to the case of multiple networks. Countries trade a variety of goods of different complexity. Every country progressively evolves from trading less sophisticated to high-tech goods. The probabilities of capturing more trade opportunities at a given level of complexity and of starting to trade more complex goods are both proportional to the number of existing trade links. We provide a set of theoretical predictions and simulative results. A calibration exercise shows that our model replicates the same concentration level of world trade as well as the sparsity pattern of the trade matrix. We also discuss a set of numerical solutions to deal with large multiple networks.
PB  - American Physical Society
SN  - 1539-3755
A1  - Foschi, Rachele
A1  - Riccaboni, Massimo
A1  - Schiavo, Stefano
ER  -