Community Structure in the United States House of Representatives

Details Community Structure in the United States House of Representatives Community Structure in the United States House of Representatives

2006-02-04

arxiv.org/abs/physics/0602033v3

Physics

Physics and Society

44 pages, 13 figures (some with multiple parts and most in color), 9 tables, to appear in Physica A; new figures and revised d

Scientific paper

10.1063/1.2390556

We investigate the networks of committee and subcommittee assignments in the United States House of Representatives from the 101st--108th Congresses, with the committees connected by ``interlocks'' or common membership. We examine the community structure in these networks using several methods, revealing strong links between certain committees as well as an intrinsic hierarchical structure in the House as a whole. We identify structural changes, including additional hierarchical levels and higher modularity, resulting from the 1994 election, in which the Republican party earned majority status in the House for the first time in more than forty years. We also combine our network approach with analysis of roll call votes using singular value decomposition to uncover correlations between the political and organizational structure of House committees.

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