Betweenness centrality as a driver of preferential attachment in the evolution of research collaboration networks
Betweenness centrality as a driver of preferential attachment in the evolution of research collaboration networks
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DOI：
10.1016/j.joi.2012.01.002
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发表时间：
2012-07-01
影响因子：
3.7
通讯作者：
Leydesdorff, Loet
中科院分区：
文献类型：
--
作者：
Abbasi, Alireza;Hossain, Liaquat;Leydesdorff, Loet
我们分析了不同中心性形式的作者在科学合作网络中的优先依恋是否存在差异。使用一个完整的数据库来研究“钢结构”的科学特性，我们表明，现有节点的介数中心性比程度或接近中心性显著更好地预测新进入者的偏好依恋。在网络的发展过程中，偏好依恋从(局部)度中心性转变为作为全球衡量标准的介入度中心性。一种解释是，博士项目的主管和博士后在新进入者和现有网络之间充当中间人，从而成为优先依恋的焦点。由于这种中介作用，可以预期学术网络的发展将不同于基于对具有高度中心性的节点的优先依恋的网络。(C)2012爱思唯尔有限公司。保留所有权利。
We analyze whether preferential attachment in scientific coauthorship networks is different for authors with different forms of centrality. Using a complete database for the scientific specialty of research about "steel structures," we show that betweenness centrality of an existing node is a significantly better predictor of preferential attachment by new entrants than degree or closeness centrality. During the growth of a network, preferential attachment shifts from (local) degree centrality to betweenness centrality as a global measure. An interpretation is that supervisors of PhD projects and postdocs broker between new entrants and the already existing network, and thus become focal to preferential attachment. Because of this mediation, scholarly networks can be expected to develop differently from networks which are predicated on preferential attachment to nodes with high degree centrality. (C) 2012 Elsevier Ltd. All rights reserved.