11. CyberAgent, Inc.
Mechanisms of CooperaOon
• Kin SelecOon
• Direct Reciprocity
• Indirect Reciprocity
• SpaOal SelecOon
• MulO-level SelecOon
ref. David G Rand, et al., Human cooperaOon. Trends in cogniOve sciences, Vol. 17, No. 8, pp. 413-25, 2013.
These mechanisms generate assortments
between fellows and strangers to keep
interacOon between cooperators.
• i.e., cooperaOon mechanisms exclude strangers
from cooperaOve groups.
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12. CyberAgent, Inc.
Problem of CooperaOon Mechanisms
• Kin SelecOon
• Direct Reciprocity
• Indirect Reciprocity
• SpaOal SelecOon
• MulO-level SelecOon
The reciprocal mechanisms require coopera(ve interac(on
in first (me mee(ng, because reciprocal cooperators cooperate others
who have cooperated them to avoid to cooperate defectors.
• i.e., to increase reciprocal relaOonships, in first Ome meeOng, they
should cooperate (not exclude) strangers to construct good
relaOonships.
There are interac(on risks, because they are unfamiliar each other.
→ How do humans take in strangers?
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