Community Structure in the United Nations General Assembly

Details Community Structure in the United Nations General Assembly Community Structure in the United Nations General Assembly

2010-10-18

arxiv.org/abs/1010.3757v1

Physica A 391, 343-361 (2012)

Physics

Physics and Society

9 pages plus 11 tables and 6 multi-part figures; Also available from http://www.amath.unc.edu/Faculty/mucha/Reprints/PhysA_UN.

Scientific paper

10.1016/j.physa.2011.06.030

We study the community structure of networks representing voting on resolutions in the United Nations General Assembly. We construct networks from the voting records of the separate annual sessions between 1946 and 2008 in three different ways: (1) by considering voting similarities as weighted unipartite networks; (2) by considering voting similarities as weighted, signed unipartite networks; and (3) by examining signed bipartite networks in which countries are connected to resolutions. For each formulation, we detect communities by optimizing network modularity using an appropriate null model. We compare and contrast the results that we obtain for these three different network representations. In so doing, we illustrate the need to consider multiple resolution parameters and explore the effectiveness of each network representation for identifying voting groups amidst the large amount of agreement typical in General Assembly votes.

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