Macroeconomics
13th Edition
ISBN: 9780134735696
Author: PARKIN, Michael
Publisher: Pearson,
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Chapter 20, Problem 8APA
(a)
To determine
Identify the J’s and Z’s
(b)
To determine
Identify the more risk averse person.
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Jamal has a utility function 1/2 U W5 , where W is hiswealth in millions of dollars and U is the utility heobtains from that wealth. In the final stage of agame show, the host offers Jamal a choice between(A) $4 million for sure and (B) a gamble that pays$1 million with probability 0.6 and $9 million withprobability 0.4.a. Graph Jamal’s utility function. Is he risk averse?Explain.b. Does A or B offer Jamal the higher expectedprize? Explain your reasoning with appropriatecalculations. (Hint: The expected value of arandom variable is the weighted average of thepossible outcomes, where the probabilities arethe weights.)c. Does A or B offer Jamal the higher expectedutility? Again, show your calculations.d. Should Jamal pick A or B? Why?
Jamal has a utility function U= W1/2 where Wis his wealth in millions of 'dollars and Uis the utility he obtains from that wealth. In the final stage
of a game show, the host offers Jamal a choice between (A) $4 million for sure, or (B) a gamble that pays $1million with a probability of 0.6 and $9 million with a probability of 0.4.
a. Graph Jamal's utility function. Is he risk-averse? Explain.
b. Does A or B offer, Jamal, a higher expected price? Explain your reasoning with appropriate calculations. (Hint: The expected value of a random variable is the weighted average of the possible outcomes, where the probabilities are the weights.)
c. Does A or B offer Jamal a higher expected utility? Again, show your calculations.
d. Should Jamal pick A or B? Why?
Khalid has a utility function U = W1/2, where W is his wealth in millions of dollarsand U is the utility he obtains from the wealth. In a game show, the host offershim a choice between (A) $4 million for sure, or (B) a gamble that pays $1million with probability 0.6 and $9 million with probability 0.4.i. Graph Khalid’s utility function with the help of above utility function. Ishe risk lover? Explain. ii. Does A or B choice offer Khalid a higher expected prize? Explain yourreasoning with appropriate calculations. iii. Does A or B offer Khalid a higher expected utility? Again, show yourcalculations. iv. Should Jamal pick A or B choice? Why?
Chapter 20 Solutions
Macroeconomics
Ch. 20.1 - Prob. 1RQCh. 20.1 - Prob. 2RQCh. 20.1 - Prob. 3RQCh. 20.1 - Prob. 4RQCh. 20.2 - Prob. 1RQCh. 20.2 - Prob. 2RQCh. 20.2 - Prob. 3RQCh. 20.2 - Prob. 4RQCh. 20.3 - Prob. 1RQCh. 20.3 - Prob. 2RQ
Ch. 20.3 - Prob. 3RQCh. 20.3 - Prob. 4RQCh. 20.4 - Prob. 1RQCh. 20.4 - Prob. 2RQCh. 20.4 - Prob. 3RQCh. 20 - Prob. 1SPACh. 20 - Prob. 2SPACh. 20 - Prob. 3SPACh. 20 - Prob. 4SPACh. 20 - Prob. 5SPACh. 20 - Prob. 6SPACh. 20 - Prob. 7APACh. 20 - Prob. 8APACh. 20 - Prob. 9APACh. 20 - Prob. 10APACh. 20 - Prob. 11APACh. 20 - Prob. 12APACh. 20 - Prob. 13APACh. 20 - Prob. 14APACh. 20 - Prob. 15APACh. 20 - Prob. 16APACh. 20 - Prob. 17APACh. 20 - Prob. 18APACh. 20 - Prob. 19APACh. 20 - Prob. 20APACh. 20 - Prob. 21APACh. 20 - Prob. 22APACh. 20 - Prob. 23APA
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- Roger's utility/u as a function of wealth/w is u = { ln w, w < 1600 w1/2, w >= 1600 Roger has $1000 and 3 options. 1. spend $400 to enter the game with probabilities of winning or losing: Win/(Lose) (500) 0 1000 3000 P(Win/(Lose)) 0.2 0.1 0.6 0.1 a. Show with workings which option roger would choose.arrow_forwardDavid is an expected-utility maximizer that likes to drive fast (and reckless at times), so his probability of an accident is 2/3. David’s preferences over wealth are u(w) = √?. Suppose that David’s initial wealth is $100. If David has an accident, he incurs a $51 loss. How much is the risk premium David willing to pay to be as well off in case of accident or not?arrow_forward5. An individual has a utility function given by (W) - √W, and initial wealth of $100. If he plays a costless lottery in which he can win or lose $10 at the flip of a coin, compute his expected utility. What is the expected gain? Will such a person be categorized as risk neutral?arrow_forward
- (a) A risk aversion strategy (b) A risk-taking strategy (c) The framing effectarrow_forwardJamal has autility function U=W1/2,where W is his wealth in millions of dollars and U is the utitlity he obtains from that wealth.Inthe final stage of a game show,the host offers offers Jamal a choice(A)$4 million dollar for sure,or (B) a gamble that pays $1 million with probability 0.6 and $9million with probability 0.4. a.Graph Jamal's utitility function.Is he risk averse?Explain. b.Does A or B offers Jamal a higher expected price?Explain your reasoning with appropriate calculations. c.Does A or B offer Jamal a higher expected utility? d.Should Jamal pick A or B? Why?arrow_forward2. Maria has $100. There is a 50% that she will lose all of it. Her utility as a functionof wealth is u(c) = √c. a. What is the maximum amount she would be willing to pay to fully insure againstthe 50% probability of the loss? b. Is she risk averse, risk loving, or risk neutral?arrow_forward
- Define risk aversion and give an example of a risk-averse person?arrow_forwardAccording to the text explain briefly how Risk Analysis helps the decision maker?arrow_forwardJamal has a utility function U = W1/2, where W is his wealth in millions of dollars and U is the utility he obtains from that wealth. In the final stage of a game show, the host offers Jamal a choice between (A) $4 million for sure, or (B) a gamble that pays $1 million with probability 0.6 and $9 million with probability 0.4. a. b. c. d. Graph Jamal’s utility function. Is he risk averse? Explain. (2+2) Does A or B offer Jamal a higher expected prize? Explain your reasoning with appropriate calculations. (1) Does A or B offer Jamal a higher expected utility? Explain your reasoning with calculations. (2) Should Jamal pick A or B? Why?arrow_forward
- What term do economists use to describe the tendency for people to prefer certain outcomes over risky situations? a. The precautionary principle b. Risk differentiationc. Risk uncertainty d. Risk aversion e. Risk managementarrow_forwardThe Healthcare Managers Team Challenge Question: Considering the same graph above, and assume that the probability of a hurricane in Springfield is 23% this coming summer: a) calculate the expected wealth and utility of the Simpson's residence; b) explain why Homer Simpson is likely to buy insurance, or why he might not be wanting to buy insurance. Note that if the hurricane takes place the value of the Simpsons' wealth will be $10,000. but if there is no hurricane, their wealth will remain at $20,000.arrow_forwardIn the final round of a TV game show, contestantshave a chance to increase their current winnings of$1 million to $2 million. If they are wrong, theirprize is decreased to $500,000. A contestant thinkshis guess will be right 50% of the time. Should heplay? What is the lowest probability of a correctguess that would make playing profitable?arrow_forward
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