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The Selfish Gene and The Evolution of Cooperation - Online.itp.ucsb ...

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• T > R > P > S (BB is Stable because T>R, P>S)<br />

• R>(S+T)/2 (AA is Optimal :better than AB, BA)<br />

ROSE<br />

COLIN<br />

A<br />

Don’t confess<br />

B<br />

Confess<br />

A<br />

Don’t confess<br />

R = Reward for<br />

cooperation<br />

(R, R)<br />

T = Temptation<br />

S = Suckers pay<strong>of</strong>f<br />

(S, T)<br />

B<br />

Confess<br />

S = Suckers pay<strong>of</strong>f<br />

T = Temptation<br />

(T,S)<br />

P = Punishment for<br />

mutual defection<br />

(P,P)

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