Preferential Attachment, Homophily, and the Structure of International Networks, 1816â€“2003
AbstractThis study examines the extent to which network formation processes in international relations parallel models that characterize the formation processes of physical, biological, and social networks. I introduce two influential models from networks sciences: Preferential Attachment (PA) models state that the probability of a new node forming a link with an existing node is a function of the latter nodeâ€™s centrality. Networks that form through a PA process tend to have a power-law degree distribution. The Homophily (HO) model states that nodes tend to attach to similar other nodes. Such networks evolve into a set of homogenous subgroups. An analysis of alliance and trade networks over the 1816 (1870)â€“2003 period reveals strong evidence that alliance networks are affected by homophily processes. Trade networks form via a preferential attachment process. The tendency of international networks to evolve according to such processes increases over time. I discuss the implications of these results.
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Bibliographic InfoArticle provided by Peace Science Society (International) in its journal Conflict Management and Peace Science.
Volume (Year): 29 (2012)
Issue (Month): 3 (July)
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Web page: http://pss.la.psu.edu/
alliances; homophily; international conflict; international networks; preferential attachment; power-law; trade;
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