A Clarified Typology of Core-Periphery Structure in Networks Ryan J. Gallagher,1, ∗ Jean-Gabriel Young,2 and Brooke Foucault Welles1, 3 1 Network Science Institute, Northeastern University 2 Center for the Study of Complex Systems, University of Michigan 3...
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A Clarified Typology of Core-Periphery Structure in Networks Ryan J. Gallagher,1, ∗ Jean-Gabriel Young,2 and Brooke Foucault Welles1, 3 1 Network Science Institute, Northeastern University 2 Center for the Study of Complex Systems, University of Michigan 3 Department of Communication Studies, Northeastern University (Dated: May 22, 2020) Core-periphery structure, the arrangement of a network into a dense core and sparse periphery, is a versatile descriptor of various social, biological, and technological networks. In practice, different core-periphery algorithms are often applied interchangeably, despite the fact that they can yield inconsistent descriptions of core-periphery structure. For example, two of the most widely used algorithms, the k-cores decomposition and the classic two-block model of Borgatti and Everett, extract fundamentally different structures: the latter partitions a network into a binary hub-and- spoke layout, while the former divides it into a layered hierarchy. W
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