Peer Influence and Homophily in the Diffusion of the iPhone 3G in a Very Large Social Network

M. Matos, Pedro A. Ferreira, D. Krackhardt
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引用次数: 4

Abstract

This paper studies the effects of peer influence and homophily on the diffusion of the iPhone 3G across a number of communities sampled from a large dataset from a major European Mobile carrier in one country. We use Stochastic Actor Based Models to capture the co-evolution of the social network as well as the dynamics of adoption. This helps to separate the roles of homophily and peer influence in the process of diffusion. We provide evidence that the propensity of a subscriber to adopt, when she is called upon to make a decision about whether she should adopt, increases with the number of friends that have already adopted. A one standard deviation increase above the mean in the number of friends that had already adopted increases the likelihood odds of adoption relative to no adoption by a factor of 2.8. The effect of peer influence is robust across a number of different specifications. The results for the effect of homophily are less clear. While, on average, we find a positive significant effect of adoption on tie formation, in many communities this effect is significant and negative and in others there is no effect at all.
iPhone 3G在超大社交网络中传播的同伴影响和同质性
本文研究了同侪影响和同质性对iPhone 3G在多个社区中传播的影响,这些社区的样本来自一个国家的一家主要欧洲移动运营商的大型数据集。我们使用基于随机行动者的模型来捕捉社会网络的共同进化以及采用的动态。这有助于区分同质性和同侪影响在传播过程中的作用。我们提供的证据表明,当一个订阅者被要求做出是否应该收养的决定时,她的收养倾向会随着已经收养的朋友的数量而增加。在已经领养孩子的朋友中,每增加一个标准差,领养孩子的可能性就会增加2.8倍。同伴影响的影响在许多不同的规范中都是稳健的。同质性效应的结果不太清楚。虽然,平均而言,我们发现收养对关系的形成有积极的显著影响,但在许多社区,这种影响是显著的和消极的,而在其他社区,根本没有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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