In the evolutionary approach to the repeated prisoner's dilemma, strategies spread in populations of emulating and experimenting agents through the principle of survival of the fittest. Although no pure strategy is evolutionarily stable in such populations, the processes of differential strategy propagation provide a promising area of study. This paper employs computer simulations to uncover how these processes govern the oscillating and open-ended evolution of alternative forms of behaviour. Certain `ecological' relationships between important strategy types which are found to be (...) responsible for these behavioural shifts are explored. (shrink)

The results of a series of computer simulations demonstrate how the introduction of separate spatial dimensions for agent interaction and learning respectively affects the possibility of cooperation evolving in the repeated prisoner's dilemma played by populations of boundedly-rational agents. In particular, the localisation of learning promotes the emergence of cooperative behaviour, while the localisation of interaction has an ambiguous effect on it.

Does greater knowledge help or hinder one’s ability to coordinate with others? While individual expertise can reveal a suitable focal point to converge on, ‘blissful’ ignorance may systematically bias decisions towards it through mere recognition. Our experiment finds in favour of the former possibility. Both specific and general knowledge are significantly associated with success in four of five coordination problems as well as over all. Our analysis suggests that more knowledgeable participants are better able to identify focal decision alternatives because (...) they are aware of more such alternatives and possess more relevant information about each. (shrink)