Research Papers of Hitoshi Yamamoto

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Evolution of Cooperation, Social Dilemma, Social Simulation, Agent-Based Modeling, Social Infomatics, Internet Sociology

Evolving Cooperation and Social Simulation an open project that studies the evolution of human cooperation toward a unifying theory of it.

Sasaki, T., Uchida, S., Okada, I., & Yamamoto, H. (2024). The Evolution of Cooperation and Diversity under Integrated Indirect Reciprocity. Games, 15(2), 15. https://doi.org/10.3390/g15020015

Yamamoto, H., Suzuki, T., Ogawa, Y. & Umetani, R. (2023). The effects of psychological attitudes on voluntary cooperation against COVID-19: an analysis using a social dilemma framework. Journal of Socio-Informatics, 16(1) pp.17-31. https://doi.org/10.14836/jsi.16.1_17

Umetani, R., Yamamoto, H., Goto, A., Okada, I., & Akiyama, E. (2023). Individuals reciprocate negative actions revealing negative upstream reciprocity. PLOS ONE, 18(7), e0288019. https://doi.org/10.1371/journal.pone.0288019

Suzuki, T., Yamamoto, H., Ogawa, and Umetani, R. (2023). Effects of media on preventive behaviour during the COVID-19 pandemic. Humanities and social sciences communications, 10, 58. https://doi.org/10.1057/s41599-023-01554-9

Yamamoto, H., Okada, I., Uchida, S., & Sasaki, T. (2022). Exploring norms indispensable for both emergence and maintenance of cooperation in indirect reciprocity. Frontiers in Physics, 10(September), 1–9. https://doi.org/10.3389/fphy.2022.1019422

Hackel, J., Yamamoto, H., Okada, I., Goto, A., & Taudes, A. (2021). Asymmetric effects of social and economic incentives on cooperation in real effort based public goods games. PLOS ONE, 16(4), e0249217. https://doi.org/10.1371/journal.pone.0249217

Okada, I., Yamamoto, H., Akiyama, E., & Toriumi, F. (2021). Cooperation in spatial public good games depends on the locality effects of game, adaptation, and punishment. Scientific Reports, 11(1), 7642. https://doi.org/10.1038/s41598-021-86668-3

Yamamoto, H., Suzuki, T., & Umetani, R. (2020). Justified defection is neither justified nor unjustified in indirect reciprocity. PLOS ONE, 15(6), e0235137. https://doi.org/10.1371/journal.pone.0235137

Toriumi, F., Yamamoto, H., & Okada, I. (2020). A belief in rewards accelerates cooperation on consumer-generated media. Journal of Computational Social Science. Vol.3, pp.19-31. https://doi.org/10.1007/s42001-019-00049-5

Okada, I., Yamamoto, H., & Uchida, S. (2020). Hybrid Assessment Scheme Based on the Stern-Judging Rule for Maintaining Cooperation under Indirect Reciprocity. Games, 11(1), 13. https://doi.org/10.3390/g11010013

Yamamoto, H., Okada, I., Taguchi, T., & Muto, M. (2019). Effect of voluntary participation on an alternating and a simultaneous prisoner's dilemma. Physical Review E, 100(3), 032304. https://doi.org/10.1103/PhysRevE.100.032304

Kobayashi, T., Ogawa, Y., Suzuki, T., & Yamamoto, H. (2019). News audience fragmentation in the Japanese Twittersphere. Asian Journal of Communication, 29(3), 274?290. https://doi.org/10.1080/01292986.2018.1458326

Uchida, S., Yamamoto, H., Okada, I., & Sasaki, T. (2019). Evolution of Cooperation with Peer Punishment under Prospect Theory. Games, 10(1), 11. https://doi.org/10.3390/g10010011

Yamamoto, H., & Suzuki, T. (2018). Effects of beliefs about sanctions on promoting cooperation in a public goods game. Palgrave Communications, 4(1), 148. https://doi.org/10.1057/s41599-018-0203-8

Okada, I., Yamamoto, H., Sato, Y., Uchida, S., & Sasaki, T. (2018). Experimental evidence of selective inattention in reputation-based cooperation. Scientific Reports, 8(1), 14813. https://doi.org/10.1038/s41598-018-33147-x

Uchida, S., Yamamoto, H., Okada, I. & Sasaki, T. (2018). A Theoretical Approach to Norm Ecosystems : Two Adaptive Architectures of Indirect Reciprocity Show Different Paths to the Evolution of Cooperation. Frontiers in Physics 6:14. https://doi.org/10.3389/fphy.2018.00014

Yamamoto, H., Okada, I., Uchida, S., & Sasaki, T. (2017). A norm knockout method on indirect reciprocity to reveal indispensable norms. Scientific Reports, 7, 44146. https://doi.org/10.1038/srep44146

Sasaki, T., Yamamoto, H., Okada, I., & Uchida, S. (2017). The Evolution of Reputation-Based Cooperation in Regular Networks. Games, 8(1), 8. http://doi.org/10.3390/g8010008

Toriumi, F., Yamamoto, H., & Okada, I. (2016). Exploring an Effective Incentive System on a Groupware. Journal of Artificial Societies and Social Simulation, 19(4). http://doi.org/10.18564/jasss.3166

Yamamoto, H., & Okada, I. (2016). How to keep punishment to maintain cooperation: Introducing social vaccine. Physica A, 443, 526-536. http://doi.org/10.1016/j.physa.2015.08.053

Okada, I., Yamamoto, H., Toriumi, F., & Sasaki, T. (2015). The Effect of Incentives and Meta-incentives on the Evolution of Cooperation. PLOS Computational Biology, 11(5), e1004232. doi:10.1371/journal.pcbi.1004232

Miyata, K., Yamamoto, H., & Ogawa, Y. (2015). What Affects the Spiral of Silence and the Hard Core on Twitter? An Analysis of the Nuclear Power Issue in Japan. American Behavioral Scientist, vol.59,No.9,pp.1129-1141, doi:10.1177/0002764215580618

Yamamoto, H., Okada, I., & Ogawa, Y. (2014). Analysis of a Public Good Game Permitted New Entries : a Role of Defectors to Maintain Cooperation. Journal of Advanced Computational Intelligence and Intelligent Informatics, 18(4), 624-631.

Toriumi, F., Yamamoto, H., & Okada, I. (2014). Influence of Payoff in Meta-Rewards Game. Journal of Advanced Computational Intelligence and Intelligent Informatics, 18(4), 616-623.

Isamu Okada, Hitoshi Yamamoto,"Mathematical description and analysis of adaptive risk choice behavior", ACM Transactions on Intelligent Systems and Technology , 14(1), 17:1--17:21,2013(1)

Isamu Okada and Hitoshi Yamamoto,"Effects of Information Diffusion in OnlineWord-of-Mouth Communication Among Consumers", Journal of Advanced Computational Intelligence and Intelligent Informatics, Vol.15 No.2, pp.197-203,2011(3)

Yamamoto, H., K., Ishida and T., Ohta,"Modeling Reputation Management System on Online C2C Market", Computational & Mathematical Organization Theory,Vol. 10,No. 2, pp.165-178,2004.

Yamamoto, Hitoshi, Kazunari Ishida and Toshizumi Ohta, Temptation and Contribution in C2C Transactions: Implications for Designing Reputation Management Systems, R. Falcone et al. (Eds.): Trusting Agents, LNAI 3577, Springer, pp.218-234,2005.

2022

Ninomiya, T., Toriumi, F. & Yamamoto, H., Opinion polarization caused by misestimation of opinion distributions, Social Simulation Conference 2022,(2022).

Suzuki, T., Yamamoto, H., & Umetani, R., How is justified defection assessed? Experimental study of the distribution of assessment rules in indirect reciprocity, The 19th International Conference on Social Dilemmas.(2022)

Yamamoto, H., Hackel, J., Okada, I., Goto, A., & Taudes, A., Effect of two types of incentives on cooperation: a real effort based public goods game, The 19th International Conference on Social Dilemmas.(2022)

2018

Yamamoto, H., Okada, I., Uchida, S. & Sasaki, T. An agent-based approach to a norm ecosystem: Exploring indispensable norms for promoting and maintaining cooperation, Social Simulation 2018 (2018).

Okada, I., Yamamoto, H., Sato, Y., Uchida, S. & Sasaki, T. A comparative experiment on the first-order information and the second-order information in indirect reciprocity, The 30 th annual meeting of the Human Behavior and Evolution Society (2018).

Yamamoto, H. Social Simulation on Social Dilemmas, Computational Social Science Meets Social Dilemmas: Integrating Simulations, Experiments, and Big Data Analyses in HICSS2018 (2018).

2017

Toriumi, F., Okada, I. & Yamamoto, H. Expectation for response encourages social media. in The Social Simulation Conference 2017 (2017).

Yamamoto, H., Okada, I., Uchida, S. & Sasaki, T. Is an unsung hero necessary? An analysis of social norms required for the transition to cooperative societies. in The Social Simulation Conference 2017 (2017).

Uchida, S. & Yamamoto, H. Games with prospect: a simple solution mechanism to social dilemma. in Mathematical Models in Ecology and Evolution (2017).

Yamamoto, H., Okada, I., Uchida, S. & Sasaki, T. Development of a norm ecosystem to understand different roles of social norms in indirect reciprocity. in Mathematical Models in Ecology and Evolution (2017).

Yamamoto, H. & Suzuki, T. Underestimating of reward and overestimating of punishment in public good game. in 17th International Conference on Social Dilemmas2 (2017).

Akiyama, E., Okada, I., Toriumi, F. & Yamamoto, H. The Effect of Second-order Rewards and Punishment in Public Goods Game --- An Experiment. in 17th International Conference on Social Dilemmas (2017).

2016

Yamamoto,H., Alternation of dominant social norms on the evolution of indirect reciprocity, The European Conference on Mathematical and Theoretical Biology (ECMTB 2016)

Fujio Toriumi, Hitoshi Yamamoto and Isamu Okada Effect of Rewarding Systems in Social Media 2016 2nd Annual International Conference On Computational Social Science, 2016

2015

Fujio Toriumi, Hitoshi Yamamoto and Isamu Okada, Modeling CGM as Public Goods Game, The Eleventh Conference of the European Social Simulation Association,electronic Proc. 2015/9/17.

Okada Isamu, Hitoshi Yamamoto, Fujio Toriumi and Tatsuya Sasaki, Make a scapegoat or cultivate praises: Two ways to prevent free-riders in a peer-to-peer sanction system, The 16th International Conference on Social Dilemmas, electronic Proc. 2015/6/25.

Hitoshi Yamamoto and Isamu Okada, From strict discriminators to tolerant ones: a simulation study on evolution of norms, The 16th International Conference on Social Dilemmas, electronic Proc. 2015/6/24.

Kobayashi, T., Ogawa, Y., Yamamoto, H., & Suzuki, T., Estimating Media Partisanship from Twitter data: A case in Japan, World Association for Public Opinion Research (WAPOR) 68th Annual Conference, electronic Proc. 2015/6/18.

Ogawa, Y., Kobayashi, T, Yamamoto, H., & Suzuki, T., News Audience Fragmentation in Japanese Twittersphere, International Communication Association (ICA) 65th Annual Conference, Preconference: New Media and Citizenship in Asia: Civic Engagement for Sustainable Development Across the Life Span, 2015/5/21.

2014

Hitoshi Yamamoto, Isamu Okada and Fujio Toriumi, Cooperation maintained by defect and collapsed by reward in a generalized metanorms game, Social Simulation Conference 2014,P68,2014.

Hitoshi Yamamoto, Isamu Okada, and Fujio Toriumi, Cooperation Accelerated by Defection and Decelerated by Reward in a Generalized Metanorms Game, 14th SAET Conference on Current Trends in Economics,2014.

Yuki Ogawa and Hitoshi Yamamoto, Does follower of majority accelerate polarization or diversity of culture?, Social Simulation Conference 2014,P94,2014.

2013

Fujio Toriumi,Hitoshi Yamamoto and Isamu Okada, "Effects of controllable facilitators on social media: simulation analysis using Generalized Metanorms Games", Proc. of 2nd International Workshop on Data Oriented Constructive Mining and Multi-Agent Simulation, electronic Proc.(4pages), 2013, 11

Yuki Ogawa, Hitoshi Yamamoto, Kakuko Miyata, and Ken'ichi Ikeda, "Association between Selective Exposure and Attitude on Twitter", Proc. of 2nd International Workshop on Data Oriented Constructive Mining and Multi-Agent Simulation, electronic Proc.(4pages), 2013, 11

Isamu Okada and Hitoshi Yamamoto, "Adaptive Risk Choice Behavior using MAS", Proc. of 2nd International Workshop on Data Oriented Constructive Mining and Multi-Agent Simulation, electronic Proc.(4pages), 2013, 11

Hitoshi Yamamoto, Yuki Ogawa, Kakuko Miyata and Ken'ichi Ikeda, "A new perspective of opinion leaders on Twitter", 63rd Annual Conference of the International Communication Association, electronic Proc., 2013, 6

Fujio Toriumi, Hitoshi Yamamoto and Isamu Okada, "Analysis of Meta-rewards Game: Application of Management Policy to Social Media", The Fifth International Workshop on Emergent Intelligence on Networked Agents, electronic Proc., 2013, 5

Hitoshi Yamamoto, Isamu Okada and Yuki Ogawa, "Analysis of a public good game permitted new entries: a role of defectors to maintain cooperation", The Fifth International Workshop on Emergent Intelligence on Networked Agents, electronic Proc., 2013, 5

Hitoshi Yamamoto ,Isamu Okada and Fujio Toriumi, An analysis of generalized metanorms game: cooperation accelerated by defection and decelerated by reward, Modelling Biological Evolution 2013, , 2013, 5

2012

F.Toriumi, H.Yamamoto,I.Okada, "Why do people use Social Media? - Agent-based simulation and population dynamics analysis of the evolution of cooperation in social media", 2012 IEEE/WIC/ACM International Conference on Intelligent Agent Technology (IAT 2012), electronic Proc., 2012(12)

H. Yamamoto, H. Suwa, "Expectations and Concerns in an Enterprise SNS", 4th World Congress on Social Simulation(WCSS), electronic Proc.,2012(9)

H. Yamamoto, I. Okada, Y.Ogawa,"Effect of defectors for cooperation: How strictly should defectors be eliminated from the newcomers?", Proc. of The 11th International Conference on Autonomous Agents and Multiagent Systems(AAMAS2012),pp.1347-1348,2012(6)

I. Okada, H.Yamamoto, "Risk choice game on an agent based model and its replicator dynamics analysis", Proc. of The 7th International Workshop on Agent-based Approaches in Economic and Social Complex Systems, electronic Proc., 2012(1)

I. Okada, H. Yamamoto, Does vengeful evaluation prevent malicious traders from invading? , New Developments in Signaling and Game Theory ,2012,10

H. Yamamoto, H. Suwa, "Expectations and Concerns in an Enterprise SNS", 4th World Congress on Social Simulation(WCSS), electronic Proc., 2012, 9

2011

Hitoshi Yamamoto and Isamu Okada, "Evolution of cooperation by defection: Effect of a social vaccine", Proc. of The 7th European Social Simulation Association Conference, 2011(9)

Hitoshi Yamamoto and Isamu Okada, Evolution of Cooperation by defection in the metanorms game, International Conference of Game Theory and Society: Models of Social Interaction in Sociological Research, 2011, 7 Workshop site

Isamu Okada and Hitoshi Yamamoto, Replicator dynamics analysis of Risk choice game, International Conference of Game Theory and Society: Models of Social Interaction in Sociological Research, 2011, 7 Workshop site

F.Toriumi, I.Okada, H.Yamamoto, H.Suwa, K.Izumi and Y.Hashimoto, "Classification of Social Network Sites based on Network Indexes and Communication Patterns", Proc. of International Workshop on Social Web Mining Co-located with IJCAI2011, 2011(7)

2001 - 2010

Hitoshi Yamamoto and Isamu Okada, "Vulnerability and Evolution of Cooperation in the Metanorms Game", Proceedings of the 3rd World Congress on Social Simulation WCSS2010

Isamu Okada and Hitoshi Yamamoto, "Evolution of Conditionally Risk Behaviour", Proceedings of the 3rd World Congress on Social Simulation WCSS2010

Ogawa Yuki, Hitoshi Yamamoto, Hirohiko Suwa, Isamu Okada and Toshizumi Ohta, "Agent-Based Model of Q&A Community for Effective Pecuniary Payback System", Proceedings of the 3rd World Congress on Social Simulation WCSS2010

Isamu Okada and Hitoshi Yamamoto ,"Effect of online word-of-mouth communication on buying behavior in agent-based simulation", Proc. of the 6th Conference of the European Social Simulation Association,2009,9

Ogawa Yuki, Hirohiko Suwa, Hitoshi Yamamoto, Isamu Okada and Toshizumi Ohta,"Development of Recommender Systems Using User Preference Tendencies: An Algorithm for Diversifying Recommendation",Proceedings of the 8th IFIP Conference on e-Business, e-Services, and e-Society (I3E 2008),pp.61-73,2008(9).

Yamamoto, Hitoshi, Isamu Okada and Toshizumi Ohta,"Vulnerability of Reputation Management System due to Tolerant Evaluation", Proc. of the 4th Conference of the European Social Simulation Association,pp.585-596,2007,9

Yamamoto, Hitoshi, Kazunari Ishida and Toshizumi Ohta,"Analysis of focal information of individuals: Gaming Approach to C2C market", Proc. Of The Fifth International Workshop on Agent-based Approaches in Economic and Social Complex Systems,pp.96-107,2007(8).

Suwa, H., H. Yamamoto, I. Okada, T. Ohta,"Effective Environment Education Program To Solve Social Dilemma", The Twelfth Annual International Sustainable Development Research Conference 2006 Conference Proceedings,CD-ROM (8pages),2006(4).

Yamamoto, H., K., Ishida and T., Ohta,"Trust Formation in a C2C Market: Effect of Reputation Management System",Proc. of Seventh International Workshop on Trust in Agent Societies, pp.126-136,2004(7)

Yamamoto, H., K., Ishida and T.,i Ohta,"Promotion of Cooperative Behavior in C2C market: Effect of Reputation Management System",Proc. of The Third International Workshop on Agent-based Approaches in Economic and Social Complex Systems pp.97-104,2004(5).

Yamamoto, H., Ishida, K and Ohta, T., "Managing Online Trade by Reputation Circulation: An Agent-Based Approach to the C2C Market", Proc. of The 7th World Multi-Conference on Systemics, Cybernetics and Informatics (SCI 2003), vol.1, pp.60-64, 2003.

Yamamoto, H., Okada, I., Kobayashi, N., Ohta, T., "The Information Channel Effect in the Winner-take-all: a Multi-Agent Simulation", Proc. of The 6th World Multi-Conference on Systemics, Cybernetics and Informatics (SCI 2002), Vol.2, pp.510-513, 2002.

Hitoshi YAMAMOTO, Isamu Okada, Toshizumi Ohta, "Information Channel Effect in consumer behavior: an agent based model", Computational Analysis of Social and Organizational Systems(CASOS) Conference 2002, 2002.

Hitoshi YAMAMOTO, Isamu Okada, Nobuchika Kobayashi, Toshizumi Ohta, "The Winner-take-all Phenomenon in Markets where Network Externality is Ineffective", Abstracts of The First Lake Arrowhead Conference on Computational Social Science and Social Complexity, No.54, 2002.

Yamamoto, H., Ohta, T., "Development of a knowledge market based on reputation, and absorption of uncertainty in electronic commerce", Proc. of The 5th World Multi-Conference on Systemics, Cybernetics and Informatics (SCI 2001), Vol.8, pp.394-399, 2001.

Hitoshi YAMAMOTO, Isamu OKADA, Makoto IGARASHI, Toshizumi OHTA, "Relation Formation by Medium Properties: A Multiagent Simulation", Proc. of The Pacific Asia Conference on Information Systems 2001(PACIS 2001), pp.351-363, 2001.

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