Abstract

In the following we study the evolution of support networks among egoists who differ widely in their degree of neediness, are free to choose their partners, and do so in opportunistic ways. No central authority is involved. The question we address is to what degree and under what aspect it shapes the structure of emerging solidarity networks whether we model egoistic actors as rational actors in a game theoretical sense or as adaptive actors, i.e. learning beings following a simple learning mechanism which is driven by success and failure.1 The central modelling ideas to address that question are: Support relationships are modelled by a 2-person support game. The social space in which a network can emerge is a 2-dimensional cellular grid. Actors can play the support game simultaneously with all their neighbours. Not all cells are occupied. From time to time players have the opportunities to migrate. In one model we make our actors rational beings, in a second one we make them adaptive agents. Obviously we use a cellular automata framework of modelling . Especially because of its simplicity that framework has often proved fruitful for analysing micro/macro relations