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Author: Sune Lehmann Publisher: Springer ISBN: 3319773321 Category : Science Languages : en Pages : 356
Book Description
This text is about spreading of information and influence in complex networks. Although previously considered similar and modeled in parallel approaches, there is now experimental evidence that epidemic and social spreading work in subtly different ways. While previously explored through modeling, there is currently an explosion of work on revealing the mechanisms underlying complex contagion based on big data and data-driven approaches. This volume consists of four parts. Part 1 is an Introduction, providing an accessible summary of the state of the art. Part 2 provides an overview of the central theoretical developments in the field. Part 3 describes the empirical work on observing spreading processes in real-world networks. Finally, Part 4 goes into detail with recent and exciting new developments: dedicated studies designed to measure specific aspects of the spreading processes, often using randomized control trials to isolate the network effect from confounders, such as homophily. Each contribution is authored by leading experts in the field. This volume, though based on technical selections of the most important results on complex spreading, remains quite accessible to the newly interested. The main benefit to the reader is that the topics are carefully structured to take the novice to the level of expert on the topic of social spreading processes. This book will be of great importance to a wide field: from researchers in physics, computer science, and sociology to professionals in public policy and public health.
Author: Sune Lehmann Publisher: Springer ISBN: 3319773321 Category : Science Languages : en Pages : 356
Book Description
This text is about spreading of information and influence in complex networks. Although previously considered similar and modeled in parallel approaches, there is now experimental evidence that epidemic and social spreading work in subtly different ways. While previously explored through modeling, there is currently an explosion of work on revealing the mechanisms underlying complex contagion based on big data and data-driven approaches. This volume consists of four parts. Part 1 is an Introduction, providing an accessible summary of the state of the art. Part 2 provides an overview of the central theoretical developments in the field. Part 3 describes the empirical work on observing spreading processes in real-world networks. Finally, Part 4 goes into detail with recent and exciting new developments: dedicated studies designed to measure specific aspects of the spreading processes, often using randomized control trials to isolate the network effect from confounders, such as homophily. Each contribution is authored by leading experts in the field. This volume, though based on technical selections of the most important results on complex spreading, remains quite accessible to the newly interested. The main benefit to the reader is that the topics are carefully structured to take the novice to the level of expert on the topic of social spreading processes. This book will be of great importance to a wide field: from researchers in physics, computer science, and sociology to professionals in public policy and public health.
Author: National Research Council Publisher: National Academies Press ISBN: 0309263646 Category : Medical Languages : en Pages : 152
Book Description
The past 25 years have seen a major paradigm shift in the field of violence prevention, from the assumption that violence is inevitable to the recognition that violence is preventable. Part of this shift has occurred in thinking about why violence occurs, and where intervention points might lie. In exploring the occurrence of violence, researchers have recognized the tendency for violent acts to cluster, to spread from place to place, and to mutate from one type to another. Furthermore, violent acts are often preceded or followed by other violent acts. In the field of public health, such a process has also been seen in the infectious disease model, in which an agent or vector initiates a specific biological pathway leading to symptoms of disease and infectivity. The agent transmits from individual to individual, and levels of the disease in the population above the baseline constitute an epidemic. Although violence does not have a readily observable biological agent as an initiator, it can follow similar epidemiological pathways. On April 30-May 1, 2012, the Institute of Medicine (IOM) Forum on Global Violence Prevention convened a workshop to explore the contagious nature of violence. Part of the Forum's mandate is to engage in multisectoral, multidirectional dialogue that explores crosscutting, evidence-based approaches to violence prevention, and the Forum has convened four workshops to this point exploring various elements of violence prevention. The workshops are designed to examine such approaches from multiple perspectives and at multiple levels of society. In particular, the workshop on the contagion of violence focused on exploring the epidemiology of the contagion, describing possible processes and mechanisms by which violence is transmitted, examining how contextual factors mitigate or exacerbate the issue. Contagion of Violence: Workshop Summary covers the major topics that arose during the 2-day workshop. It is organized by important elements of the infectious disease model so as to present the contagion of violence in a larger context and in a more compelling and comprehensive way.
Author: Serge Darolles Publisher: Elsevier ISBN: 0081004788 Category : Mathematics Languages : en Pages : 168
Book Description
Much research into financial contagion and systematic risks has been motivated by the finding that cross-market correlations (resp. coexceedances) between asset returns increase significantly during crisis periods. Is this increase due to an exogenous shock common to all markets (interdependence) or due to certain types of transmission of shocks between markets (contagion)? Darolles and Gourieroux explain that an attempt to convey contagion and causality in a static framework can be flawed due to identification problems; they provide a more precise definition of the notion of shock to strengthen the solution within a dynamic framework. This book covers the standard practice for defining shocks in SVAR models, impulse response functions, identitification issues, static and dynamic models, leading to the challenges of measurement of systematic risk and contagion, with interpretations of hedge fund survival and market liquidity risks - Features the standard practice of defining shocks to models to help you to define impulse response and dynamic consequences - Shows that identification of shocks can be solved in a dynamic framework, even within a linear perspective - Helps you to apply the models to portfolio management, risk monitoring, and the analysis of financial stability
Author: Adam Kucharski Publisher: Profile Books ISBN: 1782834303 Category : Medical Languages : en Pages : 302
Book Description
An Observer Book of the Year A Times Science Book of the Year A New Statesman Book of the Year A Financial Times Science Book of the Year 'Astonishingly bold' Daily Mail 'It is hard to imagine a more timely book ... much of the modern world will make more sense having read it.' The Times We live in a world that's more interconnected than ever before. Our lives are shaped by outbreaks - of disease, of misinformation, even of violence - that appear, spread and fade away with bewildering speed. To understand them, we need to learn the hidden laws that govern them. From 'superspreaders' who might spark a pandemic or bring down a financial system to the social dynamics that make loneliness catch on, The Rules of Contagion offers compelling insights into human behaviour and explains how we can get better at predicting what happens next. Along the way, Adam Kucharski explores how innovations spread through friendship networks, what links computer viruses with folk stories - and why the most useful predictions aren't necessarily the ones that come true. Now revised and updated with content on Covid-19.
Author: Justin K. Stearns Publisher: JHU Press ISBN: 1421401053 Category : Medical Languages : en Pages : 303
Book Description
Infectious Ideas is a comparative analysis of how Muslim and Christian scholars explained the transmission of disease in the premodern Mediterranean world. How did religious communities respond to and make sense of epidemic disease? To answer this, historian Justin K. Stearns looks at how Muslim and Christian communities conceived of contagion, focusing especially on the Iberian Peninsula in the aftermath of the Black Death. What Stearns discovers calls into question recent scholarship on Muslim and Christian reactions to the plague and leprosy. Stearns shows that rather than universally reject the concept of contagion, as most scholars have affirmed, Muslim scholars engaged in creative and rational attempts to understand it. He explores how Christian scholars used the metaphor of contagion to define proper and safe interactions with heretics, Jews, and Muslims, and how contagion itself denoted phenomena as distinct as the evil eye and the effects of corrupted air. Stearns argues that at the heart of the work of both Muslims and Christians, although their approaches differed, was a desire to protect the physical and spiritual health of their respective communities. Based on Stearns's analysis of Muslim and Christian legal, theological, historical, and medical texts in Arabic, Medieval Castilian, and Latin, Infectious Ideas is the first book to offer a comparative discussion of concepts of contagion in the premodern Mediterranean world.
Author: T. R. Hurd Publisher: Springer ISBN: 3319339303 Category : Mathematics Languages : en Pages : 146
Book Description
This volume presents a unified mathematical framework for the transmission channels for damaging shocks that can lead to instability in financial systems. As the title suggests, financial contagion is analogous to the spread of disease, and damaging financial crises may be better understood by bringing to bear ideas from studying other complex systems in our world. After considering how people have viewed financial crises and systemic risk in the past, it delves into the mechanics of the interactions between banking counterparties. It finds a common mathematical structure for types of crises that proceed through cascade mappings that approach a cascade equilibrium. Later chapters follow this theme, starting from the underlying random skeleton graph, developing into the theory of bootstrap percolation, ultimately leading to techniques that can determine the large scale nature of contagious financial cascades.
Author: Aaron Lynch Publisher: ISBN: 0786725648 Category : Philosophy Languages : en Pages : 210
Book Description
Fans of Douglas Hofstadter, Daniel Bennet, and Richard Dawkins (as well as science buffs and readers of Wired Magazine) will revel in Aaron Lynch’s groundbreaking examination of memetics--the new study of how ideas and beliefs spread. What characterizes a meme is its capacity for displacing rival ideas and beliefs in an evolutionary drama that determines and changes the way people think. Exactly how do ideas spread, and what are the factors that make them genuine thought contagions? Why, for instance, do some beliefs spread throughout society, while others dwindle to extinction? What drives those intensely held beliefs that spawn ideological and political debates such as views on abortion and opinions about sex and sexuality?By drawing on examples from everyday life, Lynch develops a conceptual basis for understanding memetics. Memes evolve by natural selection in a process similar to that of Genes in evolutionary biology. What makes an idea a potent meme is how effectively it out-propagates other ideas. In memetic evolution, the "fittest ideas” are not always the truest or the most helpful, but the ones best at self replication.Thus, crash diets spread not because of lasting benefit, but by alternating episodes of dramatic weight loss and slow regain. Each sudden thinning provokes onlookers to ask, "How did you do it?” thereby manipulating them to experiment with the diet and in turn, spread it again. The faster the pounds return, the more often these people enter that disseminating phase, all of which favors outbreaks of the most pathogenic diets. Like a software virus traveling on the Internet or a flu strain passing through a city, thought contagions proliferate by programming for their own propagation. Lynch argues that certain beliefs spread like viruses and evolve like microbes, as mutant strains vie for more adherents and more hosts. In its most revolutionary aspect, memetics asks not how people accumulate ideas, but how ideas accumulate people. Readers of this intriguing theory will be amazed to discover that many popular beliefs about family, sex, politics, religion, health, and war have succeeded by their "fitness” as thought contagions.
Author: Priscilla Wald Publisher: Duke University Press ISBN: 9780822341536 Category : Literary Criticism Languages : en Pages : 396
Book Description
DIVShows how narratives of contagion structure communities of belonging and how the lessons of these narratives are incorporated into sociological theories of cultural transmission and community formation./div
Author: Sune Lehmann
Author: Sune Lehmann
Author: National Research Council
Author: James Wharton McLaughlin
Author: Serge Darolles
Author: Adam Kucharski
Author: Elaine Hatfield
Author: Justin K. Stearns
Author: T. R. Hurd
Author: Aaron Lynch
Author: Priscilla Wald