2 citations · 4 across the 9 of their papers we have counts for
9 papers
Emergence of Reputation-Based Cooperation in LLM Agents
Kazuya Horibe, Kenji Itao, Wataru Toyokawa
Can cooperation among large language model (LLM) agents be evolutionarily stable against free-rider invasion? We study an indirect reciprocity donation game where LLM agents observ…
Collective evolutionary dynamical-systems games: Emergent turn-taking under anonymous monitoring
Kenji Itao, Kunihiko Kaneko
Sustainable resource use in large societies requires institutions that define and enforce acceptable behaviour while keeping monitoring costs manageable. Here we show that such ins…
Self-organized institutions in evolutionary dynamical-systems game
Kenji Itao, Kunihiko Kaneko
Social institutions are systems of shared norms and rules that regulate people's behaviors, often emerging without external enforcement. They provide criteria to distinguish cooper…
Formation of human kinship structures depending on population size and cultural mutation rate
Kenji Itao, Kunihiko Kaneko
How does social complexity depend on population size and cultural transmission? Kinship structures in traditional societies provide a fundamental illustration, where cultural rules…
Two universal pathways in demographic transition
Kenji Itao
Demographic transition, characterized by declines in fertility and mortality, is a global phenomenon associated with modernization. While typical patterns of fertility decline are…
Emergence of economic and social disparities through competitive gift-giving
Kenji Itao, Kunihiko Kaneko
Several tiers of social organization with varying economic and social disparities have been observed. However, a quantitative characterization of the types and the causal mechanism…
Transition of Social Organisations Driven by Gift Relationship
Kenji Itao, Kunihiko Kaneko
Anthropologists have observed gift relationships that establish social relations as well as the transference of goods in many human societies. The totality of such social relations…
Emergence of Kinship Structures and Descent Systems: Multi-level Evolutionary Simulation and Empirical Data Analysis
Kenji Itao, Kunihiko kaneko
In many indigenous societies, people are categorised into several cultural groups, or clans, within which they believe to share ancestors. Clan attributions provide certain rules f…
Evolution of family systems and resultant socio-economic structures
Kenji Itao, Kunihiko Kaneko
Families form the basis of society, and anthropologists have characterised various family systems. This study developed a multi-level evolutionary model of pre-industrial agricultu…