An extended version published as: Edmonds, B. (1999). Gossip, Sexual Recombination and the El Farol bar: modelling the emergence of heterogeneity. Journal of Artificial Societies and Social Simulation, 2(3), <http://www.soc.surrey.ac.uk/JASSS/2/3/2.html>
A detailed case-study from the simulations show how the agents have differentiated so that by the end of the run they had taken on very different roles. Thus the introduction of a flexible learning process and an expressive internal representation has allowed the emergence of heterogeneity.