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Complex Social Networks is a newly emerging (hot) topic with applications in a variety of domains, such as communication networks, engineering networks, social networks, and biological networks. In the last decade, there has been an explosive growth of research on complex real-world networks, a theme that is becoming pervasive in many disciplines, ranging from mathematics and computer science to the social and biological sciences. Optimization of complex communication networks requires a deep understanding of the interplay between the dynamics of the physical network and the information dynami

Inventors embed themselves in knowledge networks consisting of links between knowledge elements and collaboration networks with other inventors. These two networks are decoupled: Their structural features are distinct, and they jointly influence inventors' local searches for knowledge. Using a longitudinal patent dataset comprising 12,174 observations, this study investigates the effects of two structural features of inventors in these networks—degree centrality and structural holes—on their local search behaviors. Our findings reveal that the degree centrality of inventors' knowledge elements in the intra-organizational knowledge network contributes to the depth and breadth of their local search behaviors, while structural holes hinder such behaviors. Furthermore, the effect of degree centrality in the intra-organizational knowledge network for local searches increases when inventors hold central positions and span more structural holes in the intra-organizational collaboration network. The negative effect of structural holes in the knowledge network for local searches weakens when inventors hold central positions in the collaboration network. These findings contribute to the literature on knowledge searches by decoupling the knowledge and collaboration networks and analyzing their effects on the depth and breadth of local searches and offer practical implications to organizational managers and researchers.

"Is social media destroying democracy? Are Russian propaganda or ""Fake news"" entrepreneurs on Facebook undermining our sense of a shared reality? A conventional wisdom has emerged since the election of Donald Trump in 2016 that new technologies and their manipulation by foreign actors played a decisive role in his victory and are responsible for the sense of a ""post-truth"" moment in which disinformation and propaganda thrives. Network Propaganda challenges that received wisdom through the most comprehensive study yet published on media coverage of American presidential politics from the start of the election cycle in April 2015 to the one year anniversary of the Trump presidency. Analysing millions of news stories together with Twitter and Facebook shares, broadcast television and YouTube, the book provides a comprehensive overview of the architecture of contemporary American political communications. Through data analysis and detailed qualitative case studies of coverage of immigration, Clinton scandals, and the Trump Russia investigation, the book finds that the right-wing media ecosystem operates fundamentally differently than the rest of the media environment. The authors argue that longstanding institutional, political, and cultural patterns in American politics interacted with technological change since the 1970s to create a propaganda feedback loop in American conservative media. This dynamic has marginalized centre-right media and politicians, radicalized the right wing ecosystem, and rendered it susceptible to propaganda efforts, foreign and domestic. For readers outside the United States, the book offers a new perspective and methods for diagnosing the sources of, and potential solutions for, the perceived global crisis of democratic politics."

PurposeThe purpose of this paper is to explore the question of why sex harassment persists in organizations for prolonged periods – often as an open secret.Design/methodology/approachIn-depth interviews were conducted with 28 people in diverse organizations experiencing persistent sex harassment. Data were analyzed using standard qualitative methods.FindingsThe overarching finding was that perpetrators were embedded in networks of complicity that were central to explaining the persistence of sex harassment in organizations. By using power and manipulating information, perpetrators built networks that protected them from sanction and enabled their behavior to continue unchecked. Networks of complicity metastasized and caused lasting harm to victims, other employees and the organization as a whole.Research limitations/implicationsThe authors used broad, open-ended questions and guided introspection to guard against the tendency to ask for information to confirm their assumptions, and the authors analyzed the data independently to mitigate subjectivity and establish reliability.Practical implicationsTo stop persistent sex harassment, not only must perpetrators be removed, but formal and informal ties among network of complicity members must also be weakened or broken, and victims must be integrated into networks of support. Bystanders must be trained and activated to take positive action, and power must be diffused through egalitarian leadership.Social implicationsUnderstanding the power of networks in enabling perpetrators to persist in their destructive behavior is another step in countering sex harassment.Originality/valueSocial network theory has rarely been used to understand sex harassment or why it persists.