In this study we propose a formal framework for the indirect evolutionary approach as initiated by Güth and Yaari (1992). It allows to endogenize preferences and to study their evolution. We define two-player indirect evolutionary games with observable types and show how to incorporate...

Adopting an evolutionary approach, we explain the conjectural variations firms may hold in duopoly. Given conjectures, firms play the market game rationally. Success in the market game determines fitness in the evolutionary game. We show that the unique conjectures which are evolutionarily...

In this study we propose a formal framework for the indirect evolutionary approach initiated by Guth and Yaari. It allows us to endogenize preferences and to study their evolution. We define two-player indirect evolutionary games with observable types and show how to incorporate symmetric as...

Altruists and envious people who meet in contests are symbionts. They do better than a population of narrowly rational individuals. If there are only altruists and envious individuals, a particular mixture of altruists and envious individuals is evolutionarily stable.