Editorial Board
Publication date: May 2019Source: Social Networks, Volume 57Author(s): (Source: Social Networks)
Source: Social Networks - January 26, 2019 Category: Psychiatry & Psychology Source Type: research
The way bullying works: How new ties facilitate the mutual reinforcement of status and bullying in elementary schools
This study addresses the puzzle how high-status bullies in elementary school are able to maintain high status among their classmates despite bullying (some of) them. The dynamic interplay between bullying and status was studied, focusing on how relational bullying affects the creation, dissolution, and maintenance of status attributions, and vice versa. Longitudinal round-robin peer nomination data were obtained from 82 school classes in 15 Dutch elementary schools (2055 students; 50% boys) followed over three yearly measurements, starting out in grades 2–5 when students were aged 8-11. An age-dependent effect of bullyin...
Source: Social Networks - January 12, 2019 Category: Psychiatry & Psychology Source Type: research
Exploring small-world network with an elite-clique: Bringing embeddedness theory into the dynamic evolution of a venture capital network
Publication date: May 2019Source: Social Networks, Volume 57Author(s): Weiwei Gu, Jar-der Luo, Jifan LiuAbstractThis paper uses a network dynamics model to explain the formation of a small-world network with an elite-clique. This network is a small-world network with an elite-clique at its center in which elites are also the centers of many small groups. These leaders also act as bridges between different small groups. Network dynamics are an important research topic due to their ability to explain the evolution of network structures. In this paper, a Chinese Venture Capital (VC) network was coded from joint investments be...
Source: Social Networks - January 5, 2019 Category: Psychiatry & Psychology Source Type: research
Network dynamics of affiliative ties in preschool peer groups
This study investigated the network dynamics of affiliative ties in Portuguese preschool children, over three consecutive school years, using stochastic actor-based models. Our first goal was to test the extent to which different criteria to identify ties from observational data lead to different theoretical interpretations of model estimates. Contrary to past observational studies the data we use here takes into account the identities of children responsible for initiating social interactions. The second goal was to test the influence of two interaction effects involving reciprocity to analyze if reciprocity is constraine...
Source: Social Networks - January 3, 2019 Category: Psychiatry & Psychology Source Type: research
Multiplicative coevolution regression models for longitudinal networks and nodal attributes
Publication date: May 2019Source: Social Networks, Volume 57Author(s): Yanjun He, Peter D. HoffAbstractWe introduce a simple and extendable coevolution model for the analysis of longitudinal network and nodal attribute data. The model features parameters that describe three phenomena: homophily, contagion and autocorrelation of the network and nodal attribute process. Homophily here describes how changes to the network may be associated with between-node similarities in terms of their nodal attributes. Contagion refers to how node-level attributes may change depending on the network. The model we present is based upon a pa...
Source: Social Networks - January 2, 2019 Category: Psychiatry & Psychology Source Type: research
The free encyclopedia that anyone can dispute: An analysis of the micro-structural dynamics of positive and negative relations in the production of contentious Wikipedia articles
Publication date: Available online 21 December 2018Source: Social NetworksAuthor(s): Jürgen Lerner, Alessandro LomiAbstractWe consider two rival hypotheses on the emergence of organization in open production communities. According to the first (“reputation hypothesis”), patterns of agreement and disagreement among participants in open production communities are explained by differences in individual reputation for quality of contribution. The reputation hypothesis predicts that participants will tend to agree with more reputable others and disagree with less reputable others thus contributing to establish a stable ope...
Source: Social Networks - December 22, 2018 Category: Psychiatry & Psychology Source Type: research
How MPs ties to interest groups matter for legislative co-sponsorship
This article investigates whether linkages between members of parliament (MPs) and interest groups influence MPs' activities of co-sponsoring legislative proposals. Based on statistical models for network data, the study builds on classical explanations of co-sponsorships highlighting the role of similar ties between MPs, such as party membership, legislative committee assignments, electoral district or gender. It shows that, on top of these traditional forms of homophily, MPs’ ties to interest groups matter as well. MPs with ties to a similar type of interest groups are more likely to co-sponsor their respective proposa...
Source: Social Networks - December 19, 2018 Category: Psychiatry & Psychology Source Type: research
Collapse of an online social network: Burning social capital to create it?
Publication date: May 2019Source: Social Networks, Volume 57Author(s): László Lőrincz, Júlia Koltai, Anna Fruzsina Győr, Károly TakácsAbstractThe last decade has shown that sometimes even the largest online social networks (OSNs) collapse. Significant cascading mechanisms have been identified in the pattern of abandoning the OSN iWiW at its peak of popularity and after. We set out to examine the key actors who were the first to leave their networks by contrasting explanations based on the structural position of users in the network. Using heterogeneous choice models, we found that a higher number of connections as w...
Source: Social Networks - December 19, 2018 Category: Psychiatry & Psychology Source Type: research
Some days are better than others: Examining time-specific variation in the structuring of interorganizational relations
Publication date: May 2019Source: Social Networks, Volume 57Author(s): Viviana Amati, Alessandro Lomi, Daniele MasciaAbstractThe generative mechanisms controlling change in interorganizational relations are typically assumed to be time-independent, i.e., operate homogeneously and synchronously over time. In this paper we consider some of the implications of violating this assumption. We adopt and extend statistical models for relational events to reveal time-specific variations in mechanisms underlying interorganizational relations observed within a small community of health care organizations. We find that aggregate estim...
Source: Social Networks - December 14, 2018 Category: Psychiatry & Psychology Source Type: research
Do terrorists make a difference in criminal networks? An empirical analysis on illicit drug and narco-terror networks in their prioritization between security and efficiency
This study, in general, finds that networks from both camps are structurally more efficiency driven. They are denser with more direct ties; generally clustered into sub-groups attached to networks’ cores and peripheries; they reflect coreness, where key players act in pivotal positions with high power, centrality, and brokerage to efficiently control and coordinate network activities. This is then found to cause security vulnerabilities of greater visibility (susceptibility of disruption) and high dependence on central actors constituting structural holes (possible elimination of entire network when compromised). However...
Source: Social Networks - November 28, 2018 Category: Psychiatry & Psychology Source Type: research
Editorial Board
Publication date: January 2019Source: Social Networks, Volume 56Author(s): (Source: Social Networks)
Source: Social Networks - November 9, 2018 Category: Psychiatry & Psychology Source Type: research
The opacity problem in social contagion
Publication date: January 2019Source: Social Networks, Volume 56Author(s): George Berry, Christopher J. Cameron, Patrick Park, Michael MacyAbstractMany social phenomena can be modeled as cascades in networks, where nodes adopt a behavior in response to peers adopting. When studying cascades, researchers typically assume that the number of active peers when a node adopts is equivalent to the node's threshold for adoption. This assumption is rarely justified due to the “opacity problem”: networked cascades reveal intervals which contain thresholds, rather than point estimates. Existing approaches take the maximum of each...
Source: Social Networks - November 4, 2018 Category: Psychiatry & Psychology Source Type: research
Investments in and returns on network embeddedness: An experiment with trust games
Publication date: January 2019Source: Social Networks, Volume 56Author(s): Vincenz Frey, Vincent Buskens, Rense CortenAbstractTrust problems are ubiquitous in social and economic exchange. They are known to be mitigated if exchange partners are embedded in social structures that disseminate information on past behavior. If such “network embeddedness” makes exchanges possible that would not be possible otherwise, it is also expected that actors are willing to exert effort to establish embeddedness. Theory suggests that the degree to which network embeddedness facilitates trust depends on the size of the trust problem, a...
Source: Social Networks - November 3, 2018 Category: Psychiatry & Psychology Source Type: research
A sign of the times? Weak and strong polarization in the U.S. Congress, 1973–2016
Publication date: Available online 24 September 2018Source: Social NetworksAuthor(s): Zachary P. NealAbstractClaims that the United States Congress is (becoming more) polarized are widespread, but what is polarization? In this paper, I draw on notions of intergroup relations to distinguish two forms. Weak polarization occurs when relations between the polarized groups are merely absent, while strong polarization occurs when the relations between the polarized groups are negative. I apply the Stochastic Degree Sequence Model to data on bill co-sponsorship in both the U.S. House of Representatives and U.S. Senate, from 1973 ...
Source: Social Networks - October 5, 2018 Category: Psychiatry & Psychology Source Type: research
Partitioning signed networks using relocation heuristics, tabu search, and variable neighborhood search
Publication date: January 2019Source: Social Networks, Volume 56Author(s): Michael J. Brusco, Patrick DoreianAbstractRecently, there have been significant advancements in the development of exact methods and metaheuristics for partitioning signed networks. The metaheuristic advancements have led commonly to adverse implications for multiple restart (multistart) relocation heuristics for these networks. Most notably, it has been reported that multistart relocation heuristics are not computationally feasible for large signed networks with thousands or tens of thousands of vertices. In this paper, we show that combining multi...
Source: Social Networks - October 5, 2018 Category: Psychiatry & Psychology Source Type: research
