Sophisticated Play by Idiosyncratic Agents
The payoffs of a symmetric 2x2 coordination game are perturbed by agent-specific heterogeneity. Individuals observe a (possibly sampled) history of play, which forms the initial hypothesis for an opponent's behaviour. Seedings beliefs in this manner, they iteratively reason toward a Bayesian Nash equilibrium. Realised actions augment history and context evolves. Both risk-dominance and generalised risk-dominance determine equilibrium selection as heterogeneity vanishes. When sampling is sufficiently incomplete, the risk-dominant equilibrium is played irrespective of the history observed.
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