How moral codes evolve in a trust game

Jean Paul Rabanal, Daniel Friedman

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)


This paper analyzes the dynamic stability of moral codes in a two population trust game. Guided by a moral code, members of one population, the Trustors, are willing to punish members of the other population, the Trustees, who defect. Under replicator dynamics, adherence to the moral code has unstable oscillations around an interior Nash Equilibrium (NE), but under smoothed best response dynamics we obtain convergence to Quantal Response Equilibrium (QRE).

Original languageEnglish
Pages (from-to)150-160
Number of pages11
Issue number2
Publication statusPublished - 1 Jan 2015
Externally publishedYes


  • Evolutionary stability
  • Moral codes
  • Prisoner’s Dilemma

Cite this