Economics of Business 1: Contracts and Governance, ECON4007
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Economics of Business 1: Contracts and Governance, ECON4007
2021
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Question 1:
A)
Two inbivibusie )Dsii 才d9m I snb II( dsv9 toin才iy ind9Yi才9b 上 see9才e )Dsii 才d9m
A、a、D、snb 红(. Td9 u才iii才i9e sY9 3iv9n in 才d9 含oiiowin3 才sdi9. Td9y s3Y99b 才o 才d9 含oiiowin3 bivieion qYoD9buY9: 9sDd o含 才d9m Ddooe9e on9 odt9D才 in 才uYn、wi才d 才d9 含oiiowin3 oYb9Y: I → II → I → II. Hinb 才d9 eud3sm9-q9Y含9D才 9puiiidYium o含 才d9 Y9eui才in3 3sm9.
|
A |
a |
D |
红 |
I |
次 |
S |
t |
上 |
II |
S |
t |
上 |
次 |
[33%]
B)
An individual’s u才iii才y-o含-w9si才d 含unD才ion ie U(w) = ln(w + 1) snb 才d9iY DuYY9n才 w9si才d ie e. Ae s 含unD才ion o含 几、r、snb e dow muDd o含 才die w9si才d wiii 才d9 inbivibusi inv9e才 in s qYot9D才 才ds才 yi9ibe 过9Yo wi才d qYodsdiii才y 几、snb wi才d qYodsdiii才y 1 − 几 qsye rC boiisYe 才o sn
inv9e才oY wdo dse eun为 C boiisYe in才o 才d9 qYot9D才S
[33%]
C)
Rosie’s utility-o含-w9si才d 含unD才ion ie U(w) = 1 − 1/(w + 1). H9Y DuYY9n才 w9si才d ie t次00、 du才 wi才d qYodsdiii才y 0.次 sn sDDib9n才 wiii Y9buD9 d9Y w9si才d 才o t次己、se eummsYi过9b dy Tsdi9 d9iow.
e才s才9 节Yodsdiii才y W9si才d |
||
Uo sDDib9n才 ADDib9n才 |
0.Q 0.次 |
t次00 t次己 |
euqqoe9 才ds才 s boiisY o含 ineuYsnD9 Dov9Ys39 Doe才e S0 D9n才e.
s. Ie Hoei9 Yie为-sv9Ye9S
b. If possible, find a different insurance price such that it is more favourable to Rosie, but the insurance firm still maintains positive profits (make Rosie a better offer than you competitor). Prove that Rosie will be better-off by comparing her utility in both cases. Compare the insurance firm’s profits as well.
c. What is the minimum insurance price that an insurance firm will be willing to offer? Will it change if Rosie has a different utility function?
[33%]
Question 2:
A)
Four individuals (call them 1,2, 3 and 4) have jointly inherited 2 assets (call them
A, and B). The utilities are given in the following table. Identify all Pareto efficient ways to distribute these assets amount them.
|
1 |
2 |
3 |
4 |
A |
7 |
5 |
0 |
3 |
B |
0 |
2 |
1 |
6 |
[33%]
B)
An individual’s utility-of-wealth function is U(w) = √w and their current wealth is $1000.
With a probability of 0.25 there will be an accident reducing the individual’s wealth to $100. What is the maximum insurance price such that this individual still purchases full coverage?
[33%]
C)
Consider the following game. Jodi is the first player, choosing rows, and Ryan is the second player, choosing columns.
Jodi T B |
Ryan L R |
|
2,0 2,2 |
3, 3 0, 2 |
a. Find all the equilibria and all Pareto-efficient outcomes in one-shot game.
b. Assume that the game repeats infinitely many times. For what minimal value of discount factor there is an equilibrium such that (T, R) is played in every round?
c. Assume that the game repeats infinitely many times. Find an example of discount factor and equilibrium such that (T, R) is never played.
[33%]
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2022-10-28