In the "Ultimatum Game," one player (the proposer) proposes a way to split $100 and the other player (the decider) either accepts it—in which case both players get the amount proposed for them—or rejects it and neither player gets any of the cash. Deciders will nearly always reject offers of $90 for the proposer and $10 for them because:
a) ten dollars is closer to zero than ninety dollars, so the decider is really not losing much.
b) the evolution of reciprocal altruism has led to human brains being very sensitive to detecting and punishing stingy/selfish people.
c) money did not exist for most of human evolutionary history.
d) $10 has little value for anyone.
e) None of the above is correct—deciders always accept offers of cash.
Ans: b) the evolution of reciprocal altruism has led to human brains being very sensitive to detecting and punishing stingy/selfish people.
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