Reply to Myrseth and Wollbrant: Our model is consistent with altruism, and helps to explain its evolution.
Department of Psychology, Yale University, New Haven, CT 06511;
Adam
A
Bear
Department of Psychology, Yale University, New Haven, CT 06511; Department of Economics, Yale University, New Haven, CT 06511; School of Management, Yale University, New Haven, CT 06511 david.rand@yale.edu.
David G
DG
Rand
D000533:Altruism; D005075:Biological Evolution; D005716:Game Theory; D012641:Selection, Genetic