Article
Automation & Control Systems
Nima Zahabi, Daigo Shishika
Summary: In this article, the impact of stubborn individuals on opinions in social networks is investigated using nonlinear continuous opinion dynamics models. The study focuses on the presence of trust-mistrust relations in the network and extends existing models to incorporate negative edges for modeling mistrust interactions. The effects of stubborn individuals are examined for both structurally balanced and unbalanced graphs, revealing that their presence can prevent bipartite consensus even in structurally balanced graphs. Theorems are presented to provide convergence guarantees for the opinion dynamics.
IEEE TRANSACTIONS ON CONTROL OF NETWORK SYSTEMS
(2023)
Article
Multidisciplinary Sciences
Ryohei Umetani, Hitoshi Yamamoto, Akira Goto, Isamu Okada, Eizo Akiyama
Summary: Indirect reciprocity is a mechanism for explaining cooperation and can be categorized into downstream and upstream reciprocity. This paper focuses on negative upstream reciprocity and examines its occurrence and causes through experiments. The study found that if one person takes resources from another, the latter is more likely to take from a third party. The results highlight the importance of the first person not taking and suggest considering different behavioral options for future cooperation research.
Article
Physics, Multidisciplinary
Xiaowen Zhong, Ying Fan, Zengru Di
Summary: Evolutionary game theory studies the interactions between individuals, and the combination of complex network and evolutionary game theory has attracted considerable attention. Research on public goods game on different types of signed networks shows that friendly and hostile relationships have varied effects on cooperation among individuals.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Mathematics
S. Dalvandi, F. Heydari, M. Maghasedi
Summary: In this paper, the relationship between eigenvalues and connected components in signed graphs is studied, and detailed descriptions and classifications of signed graphs under certain circumstances are provided.
BULLETIN OF THE MALAYSIAN MATHEMATICAL SCIENCES SOCIETY
(2022)
Article
Automation & Control Systems
Yihan Meng, Shimin Wang, Hongwei Zhang
Summary: This article investigates leaderless output sign consensus of heterogeneous multi-agent systems over directed signed graphs. By employing a distributed sign observer to construct an autonomous system, state feedback controller and an output feedback controller are proposed to achieve sign consensus of the multi-agent system's outputs.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2022)
Article
Computer Science, Artificial Intelligence
Guangqiang Xie, Junyu Chen, Yang Li
Summary: This paper proposes a Motif-Aware Weighted Multi-agent System (MWMS) method for consensus control in multi-agent systems. By focusing on weighted networks based on both the lower-order and higher-order structures, a novel consensus framework is designed to update agents considering both quantity and quality of connections. Experimental results show that the hybrid higher-order network can effectively enhance consensus in different network topologies.
JOURNAL OF ARTIFICIAL INTELLIGENCE RESEARCH
(2021)
Article
Automation & Control Systems
Zhentao Li, Zhengxin Wang, Yuanzhen Feng
Summary: This paper investigates the fixed-time consensus problems of first-order multi-agent systems over signed directed graphs, proposing protocols for systems with and without disturbances. It is shown that systems with strongly connected topologies will achieve consensus in a fixed time if certain control parameters are met. Simulation examples are provided to demonstrate the effectiveness of the theoretical results.
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
(2021)
Article
Multidisciplinary Sciences
Yohsuke Murase, Minjae Kim, Seung Ki Baek
Summary: Explored different reputation norms and identified successful norms for promoting cooperation and evolutionary stability, highlighting similarities and differences with binary reputation norms.
SCIENTIFIC REPORTS
(2022)
Article
Mathematics, Applied
Andrew Nugent, Susana N. Gomes, Marie -Therese Wolfram
Summary: This paper proposes a new model for continuous time opinion dynamics on an evolving network. The model couples opinion formation with a network evolving through a system of ordinary differential equations for the edge weights. The impact of various edge dynamics on the opinion dynamics is investigated through analytic results and numerical simulations. The findings show that dynamic edge weights can significantly influence the opinion formation process.
PHYSICA D-NONLINEAR PHENOMENA
(2023)
Article
Automation & Control Systems
Pedro Arturo Cisneros-Velarde, Noah E. Friedkin, Anton Proskurnikov, Francesco Bullo
Summary: Structural balance is a classic property of signed graphs that has been studied by mathematical sociologists since the 1940s. Recent research has focused on developing dynamic models explaining the emergence of structural balance. By utilizing gradient-flow characterization, the study explores the transient and asymptotic behaviors of the model.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2021)
Article
Anthropology
Sandra Stark, Daniel Peter, Andreas Tutic
Summary: The study investigates the evolution of cooperation in the Volunteer's Dilemma using the stochastic Moran process on dynamic graphs, which models a birth-death dynamic on structured finite populations. The results suggest that a high degree of homophily is required for the evolution of cooperation in the Volunteer's Dilemma, while other parameters have relatively small effects on the fixation of cooperation in the population.
Article
Multidisciplinary Sciences
David Andersson, Sigrid Bratsberg, Andrew K. Ringsmuth, Astrid S. de Wijn
Summary: The challenge of sustainable and just management of large-scale common-pool resources requires sufficient cooperation and behavioral change to establish a pro-conservation norm within the sociopolitical environment. The dynamics of behavioral change in structured networks exposed to global external influence show that polarization, while temporary, can impact the speed of convergence to a final consensus. High connectivity and a favorable environment are crucial for rapidly achieving final consensus.
SCIENTIFIC REPORTS
(2021)
Article
Computer Science, Information Systems
Xianhang Zhang, Hanchen Wang, Jianke Yu, Chen Chen, Xiaoyang Wang, Wenjie Zhang
Summary: This paper proposes a polarity-based graph convolutional network (PbGCN) for sign prediction task on signed bipartite graphs. By introducing the polarity attribute and constructing one-mode projection graphs, PbGCN can effectively capture the hidden information in signed bipartite graphs.
WORLD WIDE WEB-INTERNET AND WEB INFORMATION SYSTEMS
(2022)
Article
Computer Science, Information Systems
Duoqi Song, Wenpei Wang, Ying Fan, Yanmeng Xing, An Zeng
Summary: In this study, a directed signed citation network was constructed using sentiment-labeled citation data to analyze papers in the field of Computational Linguistics. The research found that papers with different impacts have a similar probability of receiving negative citations, and highly cited papers tend to give negative citations to low-impact papers but avoid giving negative citations to high-impact papers.
INFORMATION PROCESSING & MANAGEMENT
(2022)
Article
Computer Science, Information Systems
Duoqi Song, Wenpei Wang, Ying Fan, Yanmeng Xing, An Zeng
Summary: The study reveals that negative citations have lower impact on highly cited papers, exhibit some randomness in distribution, and in the short term, negative citations are positively related to the impact of the cited paper, but negatively related in the long run.
INFORMATION PROCESSING & MANAGEMENT
(2022)
Article
Sociology
Tamas Keller, Karoly Takacs, Felix Elwert
Summary: The study suggests that publicizing admission standards can help students make more ambitious educational choices, especially those who are interested in the academic track but unsure of their chances of admission.
Article
Biology
Flora Samu, Karoly Takacs
Summary: Gossip is seen as a way to help with cooperation issues in humans, but ensuring the honesty and credibility of information remains a challenge. This study proposes two mechanisms to support the honesty and credibility of gossip, but experiments show that neither cross-checking nor social bonding were able to maintain cooperation effectively.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Engineering, Environmental
Simone Piras, Simone Righi, Marco Setti, Nazli Koseoglu, Matthew J. Grainger, Gavin B. Stewart, Matteo Vittuari
Summary: Social interactions can influence private behaviors, especially when a certain degree of mixing between different socio-demographic groups occurs and environmental committed consumers show a variability of opinions and willingness to compromise with others. This can attract a significant share of the population towards low-waste behaviors, leading to effective interventions in promoting pro-environmental actions.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Anthropology
Francesca Giardini, Daniel Balliet, Eleanor A. Power, Szabolcs Szamado, Karoly Takacs
Summary: Research in various disciplines has shown that humans are uniquely able to solve the problem of cooperation through reputation and gossip mechanisms. However, four puzzles need to be addressed to understand how reputation-based mechanisms operate: the formation and variation of reputations cross-culturally, how reputation is determined from imperfect inputs, the reliability and validity of reputation sharing and signaling, and the impact of interaction structure on the efficiency of gossip in establishing reputations and fostering cooperation.
HUMAN NATURE-AN INTERDISCIPLINARY BIOSOCIAL PERSPECTIVE
(2022)
Correction
Engineering, Environmental
Simone Piras, Simone Righi, Marco Setti, Nazli Koseoglu, Matthew J. Grainger, Gavin B. Stewart, Matteo Vittuari
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Mathematics, Interdisciplinary Applications
Simone Righi, Karoly Takacs
Summary: Cooperation problems are common among living organisms and hard to solve. Through third-party communication (gossip), cooperation can be established among individuals. However, to sustain cooperation, gossip should include personal evaluations, perspective taking, and exchange of information about cooperation.
DYNAMIC GAMES AND APPLICATIONS
(2022)
Editorial Material
Economics
Fabio Caccioli, Tiziana Di Matteo, Giulia Iori, Saqib Jafarey, Giacomo Livan, Simone Righi
JOURNAL OF ECONOMIC INTERACTION AND COORDINATION
(2022)
Article
Multidisciplinary Sciences
Szabolcs Szamado, Flora Samu, Karoly Takacs
Summary: Understanding how animals and humans can reliably signal is crucial for explaining the evolution of communication. The traditional Handicap Principle suggests that honest signals must be costly, but subsequent game theoretical models propose that honesty can be maintained by the potential cost of cheating. We conducted a laboratory experiment with human participants and found that trade-off manipulation had a greater impact on the reliability of communication than manipulating the cost of signal production. Contrary to the predictions of the Handicap Principle, negative production cost promoted high levels of honesty.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Simone Piras, Simone Righi, Federico Banchelli, Claudia Giordano, Marco Setti
Summary: Education plays a vital role in addressing food waste among consumers. However, current research on children's food waste at school lacks focus on the effectiveness of interventions and neglects the influence of behavioral and social factors. In this study, we assess the short and long-term impact of an environmental lesson on food waste levels, taking into consideration both behavioral factors and social influence. Our findings suggest that while the lesson initially reduces self-declared food waste, this effect is not sustained over time. Additionally, concerns about the environmental implications of food waste increase significantly, indicating a lasting impact.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Mathematics, Interdisciplinary Applications
Shirsendu Podder, Simone Righi
Summary: The problem of collective action, where individuals can choose to cooperate, defect, or opt out, has been studied using the optional public good game (OPGG). Reputation systems, composed of social norms and behavioral strategies, can sustain cooperation. However, the relationship between complex social norms and cooperation has been studied extensively, while the study of behavioral strategies has been limited due to high dimensionality. In this study, we built an agent-based model to explore the effect of simple social norms and genetic algorithms on behavioral strategies. Results showed that social norms that distinguish between defectors and those opting out achieve the highest levels of cooperation. Nonetheless, social norms that do not distinguish between these actions can still improve cooperation when behavioral strategies are sufficiently complex. Additionally, cooperation increases when interaction groups are small enough for accurate behavior distinctions.
DYNAMIC GAMES AND APPLICATIONS
(2023)
Article
Economics
Francesca Pancotto, Simone Righi, Karoly Takacs
Summary: The choice between defection and cooperation is often seen as the simplification of problems in cooperation, but it is also possible to walk away from the interaction in many real-life situations. Two lab-in-the-field experiments were conducted with a diverse group of subjects, playing both optional and compulsory public goods games with and without punishment. The results show that punishment is the most important institution to encourage cooperation, especially in compulsory games. In contrast to previous findings, loners are not the ones responsible for anti-social punishment; it is mainly attributed to low-contributors (free-riders). Loners neither completely free-ride nor significantly punish cooperators or other types of players; their behavior is simply avoiding participation whenever possible.
THEORY AND DECISION
(2023)
Article
Economics
Margherita Russo, Fabrizio Alboni, Jorge Carreto Sangines, Manlio De Domenico, Giuseppe Mangioni, Simone Righi, Annamaria Simonazzi
Summary: This paper analyzes the changes in the geography of trade in automotive parts and components over 25 years. It identifies clusters of countries and their specific trades, measures their relative importance and interconnections, and examines the contribution of countries and trade in the clusters. The study reveals the formation of denser and more hierarchical networks driven by Germany's trade relations with EU countries, the US preferential trade agreements with Canada and Mexico, and the rise of China. While the relative importance of clusters and individual countries varies, connections between clusters increase over time.
STRUCTURAL CHANGE AND ECONOMIC DYNAMICS
(2023)
Article
Substance Abuse
Marta K. Rado, Dorottya Kisfalusi, Anthony A. Laverty, Frank J. van Lenthe, Jasper V. Been, Karoly Takacs
Summary: Hungarian adolescents prefer friendships with peers from a similar socio-economic status, and smoking and alcohol consumption spread within these friendship networks. There is no significant difference between socio-economic groups in terms of encouraging smoking or alcohol consumption.
Article
Multidisciplinary Sciences
Szabolcs Szamado, Flora Samu, Karoly Takacs
Summary: The reliable signaling between animals and humans is a key issue in biology and social sciences, and honesty in signals can be maintained through differential trade-offs rather than high costs. The results of a laboratory experiment with human participants showed that manipulation of trade-offs had a greater influence on communication reliability, with negative production costs promoting honesty to a high level.
ROYAL SOCIETY OPEN SCIENCE
(2022)
