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Social Networks: An Introduction is the first textbook that combines new with still-valuable older methods and theories. Designed to be a core text for graduate (and some undergraduate) courses in a variety of disciplines it is well-suited for everybody who makes a first encounter with the field of social networks, both academics and practitioners. This book includes reviews, study questions and text boxes as well as using innovative pedagogy to explain mathematical models and concepts. Examples ranging from anthropology to organizational sociology and business studie

This thesis is composed by three standalone papers. The first chapter is about opinion formation processes. Individuals influence each other according to the network structure. If the network is connected and satisfies other mild assumptions, the society will reach a consensus. Therefore, it is a matter of interest understanding when the network would be connected or not. Here, we develop a model where the network takes place endogenously, and agents update their opinions accordingly. We study general conditions on the initial distribution of opinions such that consensus will be reached. We provide sufficient conditions for connectedness. In the dynamic model we show that polarization both in the transition and the long run. This essay is a joint work with Paolo Pin (Bocconi University). The second chapter is about peer effects. I consider how social pressure affects the strategic network formation process. Agents choose their links subject to mutual consent, and then equilibrium behaviors are determined by an underlying game where agents choose their effort. I provide a characterization result for all pairwise Nash stable network, and use farsightedness to avoid cycles. As an application, I consider peer effects in the classroom. Results suggest that we could set optimal policies to improve outcome of low achievement students through targeted incentives schemes. In the last chapter I focus on the interaction between real and virtual life. To do so I propose a model of search where agents choose in equilibrium how intense is their on-line activity. The outcomes of the game depend on the network, which takes place through a semi-random process. I extend the standard random network formation allowing agents to hold a certain degree of choice. The model allows to track characteristics on the meeting environment and individual preferences that would make virtual and real life substitutes or complements.

The papers in this e-book feature a number of viewpoints on the differing 'realities' of social networks and networking. The papers included cover such topics as making sense of the plethora of social tools, social networking sites, and web applications available, Value Network Analysis, social networks and work, solidarity networks, complex adaptive systems and the applicability of theories of leadership and knowledge sharing in multinationals and worldwide networks

New social media such as Facebook and Google+ are web-based communication platforms that enable socially meaningful interactions between contacts in the virtual space (Ellison et al. 2014). Studies show that new social media are particularly conducive to social capital development, as they offer its users the possibility of creating heterogeneous, extremely large electronic social networks (Hampton et al. 2011). This article presents the results of a quantitative research study on the social capital and trust of the Lithuanian population in the electronic social networks. The study used an adapted D. Williams' Internet Social Capital Scale (2006).

Notions of what a successful academic should be doing – researching, publishing, teaching, serving the academic community – are often dependent upon particular practices of corporeal mobilities. These practices discursively and materially connect historically situated academic mobilities with the "modern," globalised university system. At the same time, there is increasing attention being paid to the "hypocrisy of hypermobile academics" – often reliant on high-carbon aeromobilities – in light of the unprecedented and urgent need to decarbonise transport to limit warming to 1.5°C. Using qualitative material gathered from one academic institution in Aotearoa New Zealand, we pay attention to the politics of academic mobilities at multiple scales, from the academic body, to social/family networks, and institutional rhythms. We contribute to the growing body of work that reflects on academic practice, and argue that detailed understandings of these processes are required to overcome the so-called "climate hypocrisy" of high-carbon academic work-related travel.

AbstractThis paper constructs an institutional investor network based on the heavy holdings of the same stock in China and conducts a social network analysis to investigate the influence of this network on stock price volatility from the perspectives of network structure (density) and location (centrality). The study demonstrates that institutional investor network density is negatively related to stock price volatility, while network centrality is positively related to it. Mechanism analyses further reveal that network density reduces stock price volatility by mitigating private information arbitrage behavior among institutional investors, whereas network centrality increases stock price volatility by creating private information arbitrage opportunities within the network. Additionally, the paper finds that information asymmetry enhances the positive effect of network centrality on stock price volatility. These findings are generally consistent across subsample analyses for different market states, reactions to good and bad news, and types of equity ownership, as well as in other robustness tests. The practical implications of these findings are significant for market stability regulation.

The article discusses the historical aspects of creating a global Internet. The number of websites of organizations or individuals on the Internet today has exceeded 600 billion. Particular attention is drawn to the fact that the Internet has become a global social phenomenon as a result of economic globalization, and not the development of technology as a means of communication. All over the world, especially in countries with a high level of scientific and technological progress, it is easy to notice that people's interests have shifted from real to virtual reality, which consists of countless threads of cyberspace. The article also shows that extremist activity on the Internet has the following characteristics: justification of terrorism or terrorist activity; incitement to social, racial, national or religious instability; propaganda of racial, national or religious extremism; violation of rights based on race, nationality or religion. It is these dangers that should be excluded from the global network through the introduction of strict legislative measures of the state.