?url_ver=Z39.88-2004&rft_id=10.1101%2F074096&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=https%3A%2F%2Fpublications.ut-capitole.fr%2Fid%2Feprint%2F32499%2F&rft.title=Learning+to+cooperate%3A+The+evolution+of+social+rewards+in+repeated+interactions&rft.creator=Ak%C3%A7ay%2C+Erol&rft.creator=Dridi%2C+Slimane&rft.subject=B-+ECONOMIE+ET+FINANCE&rft.description=Understanding+the+behavioral+and+psychological+mechanisms+underlying+social+behaviors+is+one+of+the+major+outstanding+goals+of+social+evolutionary+theory.+In+particular%2C+a+persistent+question+about+human--and+animal--cooperation+is+to+what+extent+it+is+supported+by+other-regarding+preferences--the+motivation+to+increase+the+welfare+of+others.+In+real-world+situations%2C+individuals+have+the+opportunity+to+learn+from+past+interactions%2C+so+we+may+ask+how+individuals+evolve+to+learn+to+satisfy+their+social+preferences+during+the+course+of+an+interaction.+In+this+context%2C+the+rewards+an+individual+receives+from+his+social+behaviors+capture+his+preferences.+In+this+paper%2C+we+develop+a+mathematical+model+in+order+to+ask+whether+the+mere+act+of+cooperating+with+a+social+partner+will+evolve+to+be+inherently+rewarding.+In+our+model%2C+individuals+interact+repeatedly+in+pairs+and+adjust+their+behaviors+through+reinforcement+learning.+Individuals+associate+to+each+game+outcome+a+subjective+utility%2C+which+constitute+the+reward+for+that+particular+outcome.+We+find+that+utilities+that+value+mutual+cooperation+positively+but+the+sucker's+outcome+negatively+are+evolutionarily+stable.+In+a+reduced+model%2C+other-regarding+preferences+can+co-exist+with+preferences+that+match+the+sign+of+the+material+payoffs+under+narrow+conditions.+In+simulations+of+the+full+model%2C+we+find+that+selfish+preferences+that+always+learn+pure+defection+are+also+evolutionarily+successful.+These+findings+are+consistent+with+empirical+observations+showing+that+humans+tend+to+behave+according+to+distinct+behavioral+types%2C+and+call+for+further+integration+of+different+levels+of+biological+and+social+determinants+of+behavior.&rft.publisher=Biorxiv&rft.date=2017&rft.type=Monograph&rft.type=NonPeerReviewed&rft.identifier=++Ak%C3%A7ay%2C+Erol+and+Dridi%2C+Slimane+%3Chttps%3A%2F%2Fwww.idref.fr%2F241586690%3E++(2017)+Learning+to+cooperate%3A+The+evolution+of+social+rewards+in+repeated+interactions.++Biorxiv%2C+Toulouse+++++&rft.relation=http%3A%2F%2Ftse-fr.eu%2Fpub%2F32131&rft.relation=10.1101%2F074096&rft.identifier=10.1101%2F074096&rft.doi=10.1101%2F074096&rft.language=en