Contagion in networks

We introduce a probabilistic framework that represents stylized

Downloadable! This paper develops an analytical model of contagion in financial networks with arbitrary structure. We explore how the probability and potential impact of contagion is influenced by aggregate and idiosyncratic shocks, changes in network structure, and asset market liquidity. Our findings suggest that financial systems exhibit a …We introduce a probabilistic framework that represents stylized banking networks with the aim of predicting the size of contagion events. Most previous work on random financial networks assumes independent connections between banks, whereas our framework explicitly allows for (dis)assortative edge probabilities (i.e., a tendency for small banks to link to large banks). We analyze default ...

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Abstract. This paper develops an analytical model of contagion in financial networks with arbitrary structure. We explore how the probability and potential impact of contagion is influenced by aggregate and idiosyncratic shocks, changes in network structure, and asset market liquidity.The complicated interaction patterns among heterogeneous individuals have a profound impact on the contagion process in the networks. In recent years, there has been increasing evidence for the emergence of many-body interactions between two or more nodes in a wide range of biological and social networks. To encode these …This paper applies consolidated banking statistics data from the Bank for International Settlement to simulate risk contagion in a cross-border banking system with shocks of credit and liquidity. Simulation results from balance sheet network analysis show that the banking systems of the United States and United Kingdom are the most …heterogeneous networks are found to be more resilient to contagion. The impact of connectivity is more controversial: in well-capitalized networks, increasing con-nectivity improves the resilience to contagion when the initial level of connectivity is high, but increases contagion when the initial level of connectivity is low. InAbstract. In this paper, we investigate contagion risk in an endogenous financial network, which is characterized by credit relationships connecting downstream and upstream firms, interbank credit ...Risk Sharing and Contagion in Networks | The Review of Financial Studies | Oxford Academic We investigate the socially optimal design of financial networks, that allows to tackle the trade-off between risk sharing and contagion. We identify conditions Skip to Main Content Advertisement Journals Books Search Menu Menu Navbar Search Filter3. Model and mechanisms. Our model of contagion relaxes the assumption that actors can only transition from an inactive to an active state. We also allow the effects of each activation to vary over time to the extent that they coevolve with the contagion dynamics taking place in the rest of the network.We present a model of worldwide crisis contagion based on the Google matrix analysis of the world trade network obtained from the UN Comtrade database. The fraction of bankrupted countries exhibits an on-off phase transition governed by a bankruptcy threshold κ related to the trade balance of the countries. For κ>κc, the contagion is …Oil climbs on Mideast contagion fears from Israel-Gaza conflict. A person puts gas in a vehicle at a gas station in Manhattan, New York City, U.S., August 11, 2022. REUTERS/Andrew Kelly/File Photo ...Whilst sparser networks limit the ability of shocks to spread, reducing contagion, they also reduce the risk sharing capacity of the market and so increase the risk of individual banks failing. The model presented in the next section will examine this interaction and the behavior of the financial system as a whole.Streaming content from the Sec Plus Network has never been easier. With a few simple steps, you can start streaming your favorite shows and movies today. Here’s how to get started: The first step is to sign up for an account on the Sec Plus...We estimated these contagion effects by combining daily global weather data, which creates exogenous variation in running among friends, with data on the network ties and daily exercise patterns ...4. Final remarks. In this paper, we have investigated the stability and efficiency properties of networks where agents derive benefits only from other agents linked directly with them but suffer losses when any other agent who is either directly or indirectly connected to them is hit by a shock.Complex networks represent the natural backbone to study epidemic processes in populations of interacting individuals. Such a modeling framework, however, is naturally limited to pairwise interactions, making it less suitable to properly describe social contagion, where individuals acquire new norms or ideas after simultaneous exposure …Contagion: In economics and finance, a contagion can be explained as a situation where a shock in a particular economy or region spreads out and affects others by way of, say, price movements. Description: The contagion effect explains the possibility of spread of economic crisis or boom across countries or regions. This phenomenon may occur ...Our work on social networks and human behavior thus covers several domains and relies on diverse data and approaches. It builds on prior research on ‘peer effects’ and interpersonal influence by examining data in which individuals are embedded in networks much larger than two people. We summarize this work and describe critiques, …Contagion definition, the communication of disease by direct or indirect contact. See more.Abstract. This paper proposes to measure the spillover effects that cross liabilities generate on the magnitude of default in a system of financially linked institutions. Based on a simple model and an explicit criterion—the aggregate debt repayments—the measure is defined for each institution, affected by its characteristics and links to ...Therefore, risk contagion in the network may be suppressed by internal or external strategies. 2.2. Financial risk contagion in complex networks. Complex network theory provides a new method for studying risk contagion among multiple subjects (Chao et al., 2022). Allen and Gale (2000) analyzed risk contagion in a network composed of …In terms of Internet speed, most people agree that faster is always better. If you’re wondering what your network speed is, there are speed tests available on the Internet that enable you to test and measure the speed of your connection.Distinguishing influence-based contagion from homophily-driven diffusion in dynamic networks. Proceedings of the National Academy of Sciences , 106 (51) , 21544 – 21549 . CrossRef Google Scholar PubMed

The network is particularly vulnerable to contagion when the originating node is large, highly leveraged, and, crucially, has a relatively high proportion of its obligations held by other financial institutions as opposed to the nonfinancial sector, what we will call high financial connectivity.Proliferation of contagion in networks is an increasingly central problem with systemic consequences for society. For example, political divisiveness, anti-vaccination …As discussed in Section 2, contagion occurs through social interactions, and thus the process of contagion would use a social network as a substrate. In parallel, there could be an exploration process with reinforcement—akin to those introduced in Section 3—that takes place over a different network of relations/similarities between items.Abstract. In this paper, we investigate contagion risk in an endogenous financial network, which is characterized by credit relationships connecting downstream and upstream firms, interbank credit ...

Explosive Contagion in Networks | Scientific Reports. The spread of social phenomena such as behaviors, ideas or products is an ubiquitous but remarkably complex phenomenon. A successful avenue...In this paper, we study an interesting problem of emotion contagion in social networks. In particular, by employing an image social network (Flickr) as the basis of our study, we try to unveil how users' emotional statuses influence each other and how users' positions in the social network affect their influential strength on emotion. We ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Financial networks and the contagion of bank fail. Possible cause: Download Citation | Contagion in Financial Networks | The recent financial.

The First Health Network is a group of providers that accept First Health insurance and provide services to members at reduced rates, according to the First Health website. More than two million members use the First Health Network to meet ...The inherent difficulty of distinguishing true causal contagion from confounding network homophily has been noted in detail elsewhere (see, for example, refs. 23,24). However, large observational ...Luitgard A. M. Veraart. We develop a new model for solvency contagion that can be used to quantify systemic risk in stress tests of financial networks. In contrast to many existing models, it ...

Contagion in networks: Stability and efficiency - ScienceDirect Article preview Abstract Introduction Section snippets References (60) Cited by (6) Recommended articles (6) Mathematical Social Sciences Volume 115, January 2022, Pages 64-77 Contagion in networks: Stability and efficiency Spiros Bougheas Add to MendeleyAccessing your cable network’s channel guide can help you plan which shows you want to watch, and how. Plus, if your cable subscription offers DVR functions, you can plan to record your favorite shows so you don’t miss a beat.Modeling the effects and paths of systemic financial risk contagion is significant for financial stability. This paper focuses on China’s systemic financial risk from the perspective of dynamic networks. First, we construct a high-dimensional dynamic financial network model to capture risk contagion effects. Second, considering the ripple effect of financial risk …

Learn More . Network security creates shie The study of contagion dynamics in multilayer networks has become a hot topic. Networks have the characteristics of community structure. In this work, we present a comprehensive epidemic spreading model in multilayer networks with community structure. We consider the effects of population mobility, natural mortality and natural birth rate on ... Introduction. The aim of this chapter is to provide an introdThis study examines the interface of three elements during co-cont This contribution focuses on the methodology applied in papers that investigate the dynamics of contagion in financial networks using numerical simulations. In these papers, a propagation of losses and defaults in a financial system is modeled as a direct balance-sheet contagion (a.k.a. counterparty contagion), that is the direct … This paper develops an analytical model of contagion in f Contagion in Financial Networks 5 after the –rst round of contagion, thus making them vulnerable to a second-round default. The impact of any crisis that does occur could, therefore, be larger. Our model draws on the mathematics of complex systems.5 This literature describes the behaviour of connected groups of nodes in a network and predictsIn NetworkRiskMeasures: Risk Measures for (Financial) Networks. Description Usage Arguments Value References Examples. View source: R/contagion.R. Description. Given a matrix of exposures, a vector of buffers and weights (optional) the functions simulates contagion for all the shock vectors provided. FIGURE 1.Illustration of a contagion process. The adoptiThe network is particularly vulnerable to contagion when the orinetworks.5 The dynamics of conflict and contagion on the CP-star yield Complex contagions that require more than two contacts to “infected” sources can be described with threshold rules. In the following description of such general contagion dynamics, the components of a network are regarded as either active or inactive and change their state according to three fundamental processes: (i) an active node becomes … Due to the complicated transport and reactive behav We present a model of worldwide crisis contagion based on the Google matrix analysis of the world trade network obtained from the UN Comtrade database. The fraction of bankrupted countries exhibits an on-off phase transition governed by a bankruptcy threshold κ related to the trade balance of the countries. For κ>κc, the contagion is …Monitoring and controlling financial contagion in banking systems is a challenging task, and micro-structural network contagion models are becoming … Oil climbs on Mideast contagion fears from Israel-G[Dec 28, 2015 · tion is how network structure interacts with other pHere we are interested in studying the differenc Risk-sharing and contagion in networks Antonio Cabrales University College London Piero Gottardi European University Institute Fernando Vega-Redondo Universit a Bocconi April 9, 2014 Abstract We investigate the trade-o between the risk-sharing gains enjoyed by more intercon-nected rms and the costs resulting from an increased risk exposure.