Preface of the 1st International Electronic Conference on Games (IECGA 2025) ^†

1. Introduction

The 1st International Electronic Conference on Games (IECGA 2025) was held virtually from 15 to 16 October 2025.

This conference presented the latest studies in experimental game theory, applied game theory, learning and evolution in games, algorithmic game theory, computational game theory, behavioral game theory, applied mathematics, bargaining, and negotiation fields. The goal was to examine, explore, and critically engage with issues and advances in these areas.

The conference included four sessions:

S1. Algorithmic, Computational and Applied Game Theory;

S2. Behavioral, Experimental, and Cooperative Game Theory and Bargaining;

S3. Learning, Evolution, Market Design and Auctions;

S4. Non-Cooperative and General Game Theory.

2. Event Speakers

2.1. Keynote Speakers

• Assoc. Prof. Cheong Kang Hao, Nanyang Technological University, Singapore, “Winning by Losing: Unraveling the Mysteries of Parrondo’s Games”.
• Prof. Vincent Crawford, University of Oxford, UK and University of California, San Diego, USA, “Strategic Thinking: Theory, Evidence, and Applications”.
• Dr. Jie Zheng, Center for Economic Research, Shandong University, Jinan, China, “Ranking with Challenge: A Multi-stage Contest Design”.

2.2. Invited Speakers

• Prof. Indrajit Ray, Cardiff University, UK, “How do bidders perceive prior probabilities?”.
• Prof. Russell Golman, Carnegie Mellon University, USA, “Strategic sophistication, the ability to reason iteratively about others’ mental states and actions”.
• Assoc. Prof. Bruno Antonio Pansera, University Mediterranea of Reggio Calabria, Italy, “Recent developments in pursuit-evasion games”.
• Prof. Satoshi Uchida, Research Center for Ethi-Culture Studies, RINRI Institute, High-tech Research Center, Kokushikan University, Japan, “The effects of prospect theory on indirect reciprocity: from Image-Scoring to integrated reciprocity”.
• Prof. Dr. Pedro Henrique Triguis Schimit, Informatics and Knowledge Management Graduate Program, Universidade Nove de Julho Rua Vergueiro, São Paulo, Brazil, “Vaccination as a Game: Behavioural Dynamics, Network Effects and Policy Levers—A Comprehensive Review”.
• Prof. Thomas Jeitschko, Michigan State University, MI, USA, “Strategy Input Methods and Observed Behaviors: A Systematic Comparison of Manual vs. Automated Mixing in the Lab”.
• Dr. Carlos Gracia-Lázaro, Institute for Biocomputation and Physics of Complex Systems, University of Zaragoza, Zaragoza, Spain, “Evolution of Cooperation: From Theory to Experimentation”.
• Dr. Igor Erovenko, Department of Mathematics and Statistics, University of North Carolina, Greensboro, USA, “Data-driven machine learning approaches to modeling pertussis vaccine scare behavior”.
• Prof. Dr. Sun-Ki Chai, Department of Sociology, University of Hawaii, Honolulu, HI, USA, “Nested Hierarchies, Span of Control, and Norms of Cooperation”.
• Dr. Kalliopi Kastampolidou, Department of Informatics, Ionian University, Corfu, Greece, “Evolutionary Games on Networks and Biological Systems: Recent Insights and Open Challenges”.

3. Winner Announcement

3.1. Best Oral Presentation Awards

• Title: Guaranteed Payoff Equilibrium
  Authors: Alexander Rodivilov, Endre Csóka, András Pongrácz
• Title: Heterogeneous vulnerability and vaccination behavior: Evidence from experimental games
  Authors: Daniel Stephenson, Oleg Korenok, Jan Rychtar
• Title: The effect of heterogeneity on vaccination decisions
  Authors: Jan Rychtar, Dewey Taylor, Oyta Udiani, Daniel Stephenson, Oleg Korenok, Guillermo Alvarez-Pardo, Hyunju Oh
• Title: Repeated prisoner’s dilemma with errors and option to leave
  Authors: Luis R. Izquierdo, Segismundo S. Izquierdo, Robert Boyd

3.2. Best Poster Awards

• Title: Sex Differences in Cooperation and Costly Punishment under High Emotional Stress: An Experimental Study
  Authors: Victoria V. Rostovtseva, Anna A. Mezentseva, Emil R. Imameev, Yaroslav O. Sizov
• Title: Algorithmic collusion under competitive design
  Authors: Ivan Conjeaud