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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).