Towards real-world complexity: an introduction to multiplex networks

Many real-world complex systems are best modeled by multiplex networks of interacting network layers. The multiplex network study is one of the newest and hottest themes in the statistical physics of complex networks. Pioneering studies have proven that the multiplexity has broad impact on the system's structure and function. In this Colloquium paper, we present an organized review of the growing body of current literature on multiplex networks by categorizing existing studies broadly according to the type of layer coupling in the problem. Major recent advances in the field are surveyed and some outstanding open challenges and future perspectives will be proposed.Comment: 20 pages, 10 figure

Grassroots initiated networked communities: A study of hybrid physical/virtual communities

Virtual communities have been the focus of research since the beginning of the Internet. A more recent phenomenon is the hybrid networked community: a physical community extended by a network infrastructure, seeking to enhance existing social interactions, storage and dissemination of knowledge using both online and offline channels of communication. This paper considers one specific form: grassroots initiated networked communities. These are communities of locality that have developed their own Internet and /or intranet infrastructure with minimal external support. They believe that establishing such a network will enhance communication and 'sense of community' within their geographically defined boundaries. These initiatives may offer a viable and sustainable method for overcoming multiple digital inequalities, support the development of social capital, and provide insights into the impact of near-ubiquitous social computing. We review a case study of five such projects in the UK, identifying characteristics, methods of function, and long term aims. An outline of this work is presented and indications of likely future developments offered

Home Bias in Hiring: Evidence from an Online Labor Market

We study the nature of home bias in online employment, wherein the employers prefer workers from their own home countries. Using a unique large-scale dataset from a major online labor market containing employers’ consideration set of workers and their ultimate selection of workers, we first estimate employers’ home bias in their online employment decisions. Moreover, we find that employers from countries with high traditional values, lower diversity, and smaller user base (or population size), tend to have a stronger home bias. Further, we disentangle two types of home bias, i.e., statistical and taste-based, using a quasi-natural experiment wherein the platform introduces a monitoring system to facilitate employers to easily observe workers’ progress in time-based projects. After matching comparable fixed-price projects as a control group using coarsened exact matching, our difference-in-difference estimations show that the home bias in online employment is primarily driven by statistical discrimination

Social media and political participation : a case study of facebook as a plaftorm of communication, mobilization and action

Social media is increasingly used for political conversations and debate. In Hong Kong, social media has provided a convenient and accessible platform for stakeholders in the political arena to publicize their ideas and for users to be engaged in political discourse. This study aims at investigating the effects of social media on political participation among Hong Kong youth, who are generally regarded as “digital natives” and “critical citizens”. This study focuses on Facebook, the most widely-used social networking site in Hong Kong, and examines how Facebook use, connection and interactivity with political actors on Facebook, exposure to political information on Facebook and perceived information quality of Facebook relate to online and offline political participation among young people in Hong Kong. Questionnaires are collected from local post-secondary students and graduates aged between 18 and 29. Findings show that connection with political actors on Facebook and exposure to political information on Facebook mediate the impact of Facebook use on political participation, which echo the results of previous studies. Semistructured interviews are also conducted with sampled youth in order to explore the perception of Hong Kong youth on Facebook in terms of the intensity of interaction with political actors via Facebook pages and the quality of political information disseminated on Facebook. In light of the concept of public sphere and its later revisions, this research argues that social media add value to political engagement by offering alternative news and information source and facilitating a vibrant discussion of politics online. However, the effects of social media have to be qualified. Reactions to political information on Facebook and subsequent decisions on political participation also involve the expression of emotions and spontaneous response to a critical event, rather than merely depending on rational and critically informed debate. Explanations to the relationships between the variables are discussed. Sociological implications on the capabilities of social media in generating social capital and engaging users in the public sphere, as well as practical implications on the multidimensional use of social media applications and the usefulness of social media for stakeholders in socio-political aspects, are proposed. This study contributes to a greater understanding of the mobilization potential of social media in both online and offline political activism

The impact of local ICT initiatives on social capital and quality of life

This paper reviews the evidence for the effects of local ICT initiatives (‘community networks’) on neighbourhood social capital and quality of life and has been developed from the public SOCQUIT D11 report (Anderson et al, 2006)

Emergence and Constraints of Enterprise Platform Silos for Online Interactions: A Case Study from Ghana Before and During Covid-19

The purpose of this study is to understand the emergence and constraints of enterprise platform silos for online interactions at the organizational level. Information systems (IS) research has focused more on external platforms without silos. As a result, not much is known about internal platforms and silos at the organizational level and how they constrain online interactions, especially in the developing economic context of Africa. This study follows an interpretive, qualitative case study methodology and the encounter-episode process model to investigate the case of using enterprise platform silos in an organization in Ghana, before and during Covid-19. The findings show how failure to modernize the installed-based platforms, integrate platform portfolios, use enterprise architecture, and build internal competence for platform integration leads to silos. Identified constraints include challenges with information sharing and transfer between platforms, manual intervention with delays and errors, and multiple sign-ins with different password formats per user