Community Structure in the United Nations General Assembly

Abstract

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.

9 pages plus 11 tables and 6 multi-part figures; Also available from http://www.amath.unc.edu/Faculty/mucha/Reprints/PhysA_UN.pdf, containing high-res map representations of the tables not in original submission.

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• Multiple Partitioning of Multiplex Signed Networks: Application to European Parliament Votes
• Time-dependent community structure in legislation cosponsorship networks in the Congress of the Republic of Peru
• Mining and Analyzing the Italian Parliament: Party Structure and Evolution
• A modelling and computational study of the frustration index in signed networks
• Democracy and polarization in the National Assembly of the Republic of Korea