Evolution and sub-optimal behaviour

The apparently sub-optimal behaviour of economic agents in games against nature can be seen as a natural outcome of evolutionary processes. This paper extends previous work on the evolutionary stability of sub-optimal adaptations by examining how stability is affected by the introduction of multiple traits and assortative mating. It is shown that increasing the number of traits tends to increase the scope for stable second best adaptations whilst assortative mating reduces it. Various economic applications are discussed.