Imitation with incomplete information in 2x2 games

Details Imitation with incomplete information in 2x2 games Imitation with incomplete information in 2x2 games

2011-02-09

arxiv.org/abs/1102.1928v1

Biology

Quantitative Biology

Populations and Evolution

7 pages, 4 figures

Scientific paper

Evolutionary game theory has been an important tool for describing economic and social behaviour for decades. Approximate mean value equations describing the time evolution of strategy concentrations can be derived from the players' microscopic update rules. We show that they can be generalized to a learning process. As an example, we compare a restricted imitation process, in which unused parts of the role model's meta-strategy are hidden from the imitator, with the widely used imitation rule that allows the imitator to adopt the entire meta-strategy of the role model. This change in imitation behaviour greatly affects dynamics and stationary states in the iterated prisoner dilemma. Particularly we find Grim Trigger to be a more successful strategy than Tit-For-Tat especially in the weak selection regime.

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