Ppl keep saying I'm wrong to like cooperation in one-off prisoner's dilemmas, bc it's "irrational." But that's only true if you're selfish.
Because they assume game-theory is consistent with economic definitions. (Makes sense; game theory is a sub-discipline of decision theory.)
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2- utility is usually defined as a function only of one's own outcomes.
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I think that conflates what's easy to specify in toy models (personal gain) with the topic of conversation (preferences over outcomes).
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1- Economic definitions don't usually specify the role of altruism either, but I'd argue economists don't usually model altruistism since
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