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Table 2 Probability that an observer assigns G to a donor

From: Groupwise information sharing promotes ingroup favoritism in indirect reciprocity

Rule ΦG(C, G) ΦG(D, G) ΦG(C, B) ΦG(D, B)
IM 1−μ μ 1−μ μ
ST 1−μ μ 1−μ 1−μ
JG 1−μ μ μ 1−μ
  1. ΦG(a,r) represents the probability that a donor receives G when the donor selects action a{C, D} and the recipient has reputation r{G, B}. The donor receives B with probability ΦB(a,r) = 1−ΦG(a,r).