Article

Homo moralis - Preference evolution under incomplete information and assortative matching

Ingela Alger et Jörgen W. Weibull

Résumé

What preferences will prevail in a society of rational individuals when preference evolution is driven by the resulting payoffs? We show that when individuals' preferences are their private information, a convex combination of selfishness and morality stands out as evolutionarily stable. We call individuals with such preferences homo moralis. At one end of the spectrum is homo oeconomicus, who acts so as to maximize his or her own payoff. At the opposite end is homo kantiensis, who does what would be “the right thing to do,” in terms of payoffs, if all others would do likewise. We show that the stable degree of morality—the weight placed on the moral goal—is determined by the degree of assortativity in the process whereby individuals are matched to interact.

Mots-clés

evolutionary stability; preference evolution; moral values; incomplete information; assortative matching;

Remplace

Ingela Alger et Jörgen W. Weibull, « Homo Moralis-Preference evolution under incomplete information and assortative matching », TSE Working Paper, n° 12-281, février 2012.

Référence

Ingela Alger et Jörgen W. Weibull, « Homo moralis - Preference evolution under incomplete information and assortative matching  », Econometrica, vol. 81, n° 6, novembre 2013, p. 2269–2302.

Voir aussi

Publié dans

Econometrica, vol. 81, n° 6, novembre 2013, p. 2269–2302