Question

In: Statistics and Probability

Problem 13-29 (Algorithmic) Three decision makers have assessed utilities for the following decision problem (payoff in...

Problem 13-29 (Algorithmic)

Three decision makers have assessed utilities for the following decision problem (payoff in dollars):

State of Nature

Decision Alternative

S1

S2

S3

d1

10

40

-30

d2

90

110

-80

The indifference probabilities are as follows:

Indifference Probability (p)

Payoff

Decision maker A

Decision maker B

Decision maker C

110

1.00

1.00

1.00

90

0.95

0.80

0.85

40

0.85

0.70

0.75

10

0.75

0.55

0.60

-30

0.60

0.25

0.50

-80

0.00

0.00

0.00

Find a recommended decision for each of the three decision makers, if P(s1) = 0.25, P(s2) = 0.60, and P(s3) = 0.15. (Note: For the same decision problem, different utilities can lead to different decisions.) If required, round your answers to two decimal places.

Decision maker A

EU(d1) =

EU(d2) =

Recommended decision:  

Decision maker B

EU(d1) =

EU(d2) =

Recommended decision:  

Decision maker C

EU(d1) =

EU(d2) =

Recommended decision:  

Solutions

Expert Solution

Ans. Expected value / utility here is a weighted average of the payoffs for a decision alternative.

EU (something) = Probablities * payoff values

In the second indifference probability table payoffs are the same as the first table & given by the combination of payoff between s1,s2,s3 and given ascendingly. The payoff of decision 1 in first table which exactly be given in the second table & corresponding probabilities , those will be using to calculate the EU(d1) for decision maker A,B,C and same process will be following to calculate the EU(d2) for decision maker A,B,C.

Decision maker A

EU(d1) = 23.5

EU(d2) = 195.5

EU(d2) - EU(d1) = 172

Recommended decision: d2

Decision maker B

EU(d1) = 24

EU(d2) = 182

EU(d2) - EU(d1) = 182 - 24 = 158

Recommended decision: d2

Decision maker C

EU(d1) = 34.5

EU(d2) = 186.5

EU(d2) - EU(d1) = 186.5 - 34.5 = 152

Recommended decision: d2

Now expected utility of EU(d1) & EU(d2) across state of nature :

Since P(s1) = 0.25

P(s2) = 0.60

P(s3) = 0.15

So, EU(d1) = 10*0.25 + 40*0.60 - 30*0.15 = 22

EU(d2) = 90*0.25 + 110*0.60 - 80*0.15

= 76.5

Now EU(d2) - EU(d1) = 54.5

So if EU(d2) - EU(d1) <=> 54.5 , for three decision makers then decision makers will decide d1, indifferent between two , d2 accordingly.


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