Publications

Publications of ECOSOS

2025

• Yamamoto, H., Suzuki, T. (2025). Exploring condition in which people accept AI over human judgements on justified defection. Scientific Reports, 15, 3339. doi:10.1038/s41598-025-87170-w

2024

• Yamamoto, H., Okada, I., Sasaki, T., & Uchida, S. (2024). Clarifying social norms which have robustness against reputation costs and defector invasion in indirect reciprocity. Scientific Reports, 14(1), 25073. doi: 10.1038/s41598-024-76168-5
• Yamamoto, H., & Goto, A. (2024). Behavioural strategies in simultaneous and alternating prisoner’s dilemma games with/without voluntary participation. Scientific Reports, 14(1), 21890. doi:10.1038/s41598-024-73353-4
• Uchida, S., Sasaki, T., Yamamoto, H., & Okada, I. (2024). Evolution of “Pay-It-Forward” in the Presence of the Temptation to Free-Ride. Games, 15(3), 16. doi:10.3390/g15030016
• Sasaki, T., Uchida, S., Okada, I., & Yamamoto, H. (2024). The Evolution of Cooperation and Diversity under Integrated Indirect Reciprocity. Games, 15(2), 15. doi:10.3390/g15020015

2023

• 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. doi: 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. doi: 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. doi: 10.1057/s41599-023-01554-9

2022

• 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. doi: 10.3389/fphy.2022.1019422

2021

• 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. doi: 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. doi: 10.1038/s41598-021-86668-3

2020

• Yamamoto, H., Suzuki, T., & Umetani, R. (2020). Justified defection is neither justified nor unjustified in indirect reciprocity. PLOS ONE, 15(6), e0235137. doi: 10.1371/journal.pone.0235137
• 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. doi: 10.3390/g11010013

2019

• 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. doi: 10.1103/PhysRevE.100.032304
• Toriumi, F., Yamamoto, H., & Okada, I. (2019). A belief in rewards accelerates cooperation on consumer-generated media. Journal of Computational Social Science. doi: 10.1007/s42001-019-00049-5
• Uchida, S., Yamamoto, H., Okada, I., & Sasaki, T. (2019). Evolution of Cooperation with Peer Punishment under Prospect Theory. Games, 10(1), 11. doi: 10.3390/g10010011

2018

• Yamamoto, H., & Suzuki, T. (2018). Effects of beliefs about sanctions on promoting cooperation in a public goods game. Palgrave Communications, 4(1), 148. doi: 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. doi: 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. doi: 10.3389/fphy.2018.00014.

2017

• Okada, I., Sasaki, T., & Nakai, Y. (2017). Tolerant indirect reciprocity can boost social welfare through solidarity with unconditional cooperators in private monitoring. Scientific Reports 7:9737. doi: 10.1038/s41598-017-09935-2.
• Yamamoto, H., Okada, I., Uchida, S., & Sasaki, T. (2017). A norm knockout method on indirect reciprocity to reveal indispensable norms. Scientific Reports 7:44146. doi: 10.1038/srep44146.
• Sasaki, T., Okada, I., & Nakai, Y. (2017). The evolution of conditional moral assessment in indirect reciprocity. Scientific Reports 7, 41870. doi: 10.1038/srep41870
• Sasaki, T., Yamamoto, H., Okada, I., & Uchida, S. (2017). The evolution of reputation-based cooperation in regular networks. Games 8(1), 8. doi: 10.3390/g8010008

2016

• Toriumi, F., Yamamoto, H., & Okada, I. (2016). Exploring an effective incentive system on a groupware. Journal of Artificial Societies and Social Simulation 19(4), 6. https://doi.org/10.18564/jasss.3166
• Sasaki, T., Okada, I., & Nakai, Y. (2016). Indirect reciprocity can overcome free-rider problems on costly moral assessment. Biology Letters 12(7), 20160341. doi: 10.1098/rsbl.2016.0341