162 citations · 484 across the 21 of their papers we have counts for
21 papers
Social contagion induced by uncertain information
Teruyoshi Kobayashi
Information and individual activities often spread globally through the network of social ties. While social contagion phenomena have been extensively studied within the framework…
Consistency between ordering and clustering methods for graphs
Tatsuro Kawamoto, Masaki Ochi, Teruyoshi Kobayashi
A relational dataset is often analyzed by optimally assigning a label to each element through clustering or ordering. While similar characterizations of a dataset would be achieved…
Financial fire sales as continuous-state complex contagion
Tomokatsu Onaga, Fabio Caccioli, Teruyoshi Kobayashi
Trading activities in financial systems create various channels through which systemic risk can propagate. An important contagion channel is financial fire sales, where a bank fail…
Diffusion dynamics of competing information on networks
Teruyoshi Kobayashi
Information diffusion on social networks has been described as a collective outcome of threshold behaviors in the framework of threshold models. However, since the existing models…
Identifying the temporal dynamics of densification and sparsification in human contact networks
Shaunette T. Ferguson, Teruyoshi Kobayashi
Temporal social networks of human interactions are preponderant in understanding the fundamental patterns of human behavior. In these networks, interactions occur locally between i…
Sequential locality of graphs and its hypothesis testing
Tatsuro Kawamoto, Teruyoshi Kobayashi
The adjacency matrix is the most fundamental and intuitive object in graph analysis that is useful not only mathematically but also for visualizing the structures of graphs. Becaus…
Unstable diffusion in social networks
Teruyoshi Kobayashi, Yoshitaka Ogisu, Tomokatsu Onaga
How and to what extent will new activities spread through social ties? Here, we develop a more sophisticated framework than the standard mean-field approach to describe the diffusi…
Dynamics of diffusion on monoplex and multiplex networks: A message-passing approach
Teruyoshi Kobayashi, Tomokatsu Onaga
New ideas and technologies adopted by a small number of individuals occasionally spread globally through a complex web of social ties. Here, we present a simple and general approxi…
Two types of densification scaling in the evolution of temporal networks
Teruyoshi Kobayashi, Mathieu Génois
Many real-world social networks constantly change their global properties over time, such as the number of edges, size and density. While temporal and local properties of social ne…
Detecting multi-timescale consumption patterns from receipt data: A non-negative tensor factorization approach
Akira Matsui, Teruyoshi Kobayashi, Daisuke Moriwaki +1
Understanding consumer behavior is an important task, not only for developing marketing strategies but also for the management of economic policies. Detecting consumption patterns,…
The structured backbone of temporal social ties
Teruyoshi Kobayashi, Taro Takaguchi, Alain Barrat
In many data sets, crucial information on the structure and temporality of a system coexists with noise and non-essential elements. In networked systems, for instance, some edges m…
Extracting the multi-timescale activity patterns of online financial markets
Teruyoshi Kobayashi, Anna Sapienza, Emilio Ferrara
Online financial markets can be represented as complex systems where trading dynamics can be captured and characterized at different resolutions and time scales. In this work, we d…
Network models of financial systemic risk: A review
Fabio Caccioli, Paolo Barucca, Teruyoshi Kobayashi
The global financial system can be represented as a large complex network in which banks, hedge funds and other financial institutions are interconnected to each other through visi…
Identifying relationship lending in the interbank market: A network approach
Teruyoshi Kobayashi, Taro Takaguchi
Relationship lending is broadly interpreted as a strong partnership between a lender and a borrower. Nevertheless, we still lack consensus regarding how to quantify the strength of…
Social dynamics of financial networks
Teruyoshi Kobayashi, Taro Takaguchi
The global financial crisis in 2007-2009 demonstrated that systemic risk can spread all over the world through a complex web of financial linkages, yet we still lack fundamental kn…
Fragmenting networks by targeting collective influencers at a mesoscopic level
Teruyoshi Kobayashi, Naoki Masuda
A practical approach to protecting networks against epidemic processes such as spreading of infectious diseases, malware, and harmful viral information is to remove some influentia…
Trend-driven information cascades on random networks
Teruyoshi Kobayashi
Threshold models of global cascades have been extensively used to model real-world collective behavior, such as the contagious spread of fads and the adoption of new technologies.…
Cascades in multiplex financial networks with debts of different seniority
Charles D. Brummitt, Teruyoshi Kobayashi
The seniority of debt, which determines the order in which a bankrupt institution repays its debts, is an important and sometimes contentious feature of financial crises, yet its i…
A model of financial contagion with variable asset returns may be replaced with a simple threshold model of cascades
Teruyoshi Kobayashi
I show the equivalence between a model of financial contagion and the threshold model of global cascades proposed by Watts (2002). The model financial network comprises banks that…
Network versus portfolio structure in financial systems
Teruyoshi Kobayashi
The question of how to stabilize financial systems has attracted considerable attention since the global financial crisis of 2007-2009. Recently, Beale et al. ("Individual versus s…
Efficient immunization strategies to prevent financial contagion
Teruyoshi Kobayashi, Kohei Hasui
Many immunization strategies have been proposed to prevent infectious viruses from spreading through a network. In this study, we propose efficient immunization strategies to preve…