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Unformatted text preview: Managing Risks: Prelims Attitudes towards risk Risk neutral: indifferent between uncertain outcome and the average outcome Risk averse: prefers the average outcome to an uncertain outcome Risk taker: prefers the uncertain outcome (i.e, prefers the gamble) Note: not the same as different beliefs Risk attitudes: Examples Suppose individual has $10 Gamble: bet $x and win $20 or $0 w/ probability (1/2;1/2) Find the amount $x willing to pay to participate: If (a) utility U(w)=w (i.e, risk neutral) If (b) utility U(w)=w 1/2 (i.e., risk averse) If (c) utility U(w)=w 2 (i.e., risk taker) Risk neutral: u 10x 30x 20x 20x U(w)=w 30x 10x Risk neutral: maximum bet If bet $x, the final wealth will be: For riskneutral, U=w, expected utility is: Since individual gets utility u=10 if doesnt not participate, then $x is such that: w x prob x prob = 30 0 5 10 0 5 . . EU x x x [ ] ( . )( ) ( . )( ) =  +  =  05 30 05 10 20 U EU x x ( ) [ ] 10 10 10 20 10 = = = = Risk neutral: Discussion The risk neutral investor is indifferent between the expected utility and the utility from consuming the average wealth, $10. Alternatively, risk neutral individual is not willing to pay a premium to avoid the gamble Risk averse: maximum bet If bet $x, the final wealth will be: For riskaverse guy, U=w...
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 Spring '08
 KUTSOATI
 Economics

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