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DescriptionSERS.png
English: The SERS Decision Tree for single step PD games. The expected value of cooperation is given by R × ps + S × (1-ps), the expected value for defection is given by P x ps + T x (1 - ps). Thus cooperation should be preferred over defection whenever R x ps + S x (1 - ps) > P x ps + T x (1 - ps), or when ps > ps*
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