FNCE 239 Lecture 10: Lecture 10 Notes

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How does a standard raional decision maker make the decision on how much to gamble? o o o o o. They try to calculate their expected uility in some way or another. They try to calculate eu of their future wealth subject to the payofs that the gamble will give. It"s increasing (people prefer more wealth than less) The irst few addiional 7427$ bring you more uility than the last addiional 7427$ (decreasing marginal uility) Conclusion: your expected uility of taking the gamble is less than the expected uility of not taking the gamble. This is because the expected uility is a straight line below the concave line. Whenever you take a weighted average of 2 points, it"s going to end up in a straight line, which will always be below the concave line. You always prefer with certainty to get the expected value of the gamble than to take the gamble and get the same value.

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