Core and periphery in networks

被引:104
作者
Hojman, Daniel A. [2 ]
Szeid, Adam [1 ]
机构
[1] Univ Calif Berkeley, Dept Econ, Berkeley, CA 94720 USA
[2] Harvard Univ, Kennedy Sch Govt, Cambridge, MA 02138 USA
关键词
social networks; social capital; network formation; centrality;
D O I
10.1016/j.jet.2007.07.007
中图分类号
F [经济];
学科分类号
02 ;
摘要
We study a model of network formation where the benefits from connections exhibit decreasing returns and decay with network distance. We show that the unique equilibrium network is a periphery-sponsored star, where one player, the center, maintains no links and earns a high payoff, while all other players maintain a single link to the center and earn lower payoffs. Both the star architecture and payoff inequality are preserved in an extension of the model where agents can make transfers and bargain over the formation of links, under the condition that the surplus of connections increases in the size of agents' neighborhoods. Our model thus generates two common features of social and economic networks: (1) a core-periphery structure; (2) positive correlation between network centrality and payoffs. (c) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码:295 / 309
页数:15
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