Koskinen Johan, Edling Christofer
ReMiSS, Department of Politics and International Relations, University of Oxford, Manor Road, Oxford OX1 3UQ, United Kingdom & Nuffield College, New Road, Oxford, OX1 NF, United Kingdom.
School of Humanities and Social Sciences, Jacobs University, Germany.
Soc Networks. 2012 Jul 1;34(3):309-322. doi: 10.1016/j.socnet.2010.03.001.
A central part of relational ties between social actors are constituted by shared affiliations and events. The action of joint participation reinforces personal ties between social actors as well as mutually shared values and norms that in turn perpetuate the patterns of social action that define groups. Therefore the study of bipartite networks is central to social science. Furthermore, the dynamics of these processes suggests that bipartite networks should not be considered static structures but rather be studied over time. In order to model the evolution of bipartite networks empirically we introduce a class of models and a Bayesian inference scheme that extends previous stochastic actor-oriented models for unimodal graphs. Contemporary research on interlocking directorates provides an area of research in which it seems reasonable to apply the model. Specifically, we address the question of how tie formation, i.e. director recruitment, contributes to the structural properties of the interlocking directorate network. For boards of directors on the Stockholm stock exchange we propose that a prolific mechanism in tie formation is that of peer referral. The results indicate that such a mechanism is present, generating multiple interlocks between boards.
社会行为体之间关系纽带的核心部分由共同的从属关系和事件构成。联合参与行为强化了社会行为体之间的个人联系以及相互共享的价值观和规范，而这些价值观和规范反过来又使界定群体的社会行为模式得以延续。因此，二分网络的研究是社会科学的核心内容。此外，这些过程的动态性表明，二分网络不应被视为静态结构，而应随着时间推移进行研究。为了从实证角度对二分网络的演化进行建模，我们引入了一类模型和一种贝叶斯推理方案，该方案扩展了先前针对单峰图的面向随机行为体的模型。当代关于连锁董事会的研究提供了一个似乎适合应用该模型的研究领域。具体而言，我们探讨了关系形成（即董事招募）如何影响连锁董事会网络的结构属性这一问题。对于斯德哥尔摩证券交易所的董事会，我们提出关系形成中的一个多产机制是同行推荐。结果表明存在这样一种机制，它在董事会之间产生了多重连锁关系。
