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SOLUTION TO THE HOMEWORK
一、
Chapter 1
完全信息静态博弈
Static Games
of
Complete Information
1
、
In the
following normal-form game,what strategies
survive iterated elimination of
strictly dominated
strategies ?What are
the pure-strategy Nash equilibrium?
L
C
R
T
2,0
1,1
4,2
M
3,4
1,2
2,3
B
1,3
0,2
3,0
p>
纯策略
NE
有
2<
/p>
个:
(
M,
L
)和(
T,
R
)
第二
第一
2
、
Players 1 and 2
are bargaining over how to
split 10 thousand players
simultaneously name shares
they would like to
have,s
1
and
s
2
,where
0
≤
s
1
,s
2
≤
s
1
+s
2
≤
1,
then the players receive the shares
they named;
if
s
1
+s
2
>
1,then both
players receive
are the
pure-strategy Nash equilibrium of this
game?
纯策略
NE
有无数:
(
S
*
1
,
S
*
2
)
,
S
*
1
+
S
*
2
=
1.
3
、
Suppose there
are
n
firms in the Cournot
oligopoly model,
let
q
i
denote the quantity
produced by firm i, and let
Q=q
1
+…+
q
n
denote the aggregate
quantity on the market .
Let p denote
the market-clearing price and assume that
inverse demand is given by
p(Q)=a-Q(assuming Q
<
a,else
p=0).Assume that the total cost of firm
i from producing
quantity
q
i
is
C
i
(q
i
) =cq
i
.That is, where are
no fixed costs
and the marginal cost is
constant at c,where we assume
c
<
a.
Following
Cournot, suppose that the firms choose their
quantities simultaneously. What is the
Nash equilibrium?
What
happens as n approaches infinity?
q
i
= (a-c)/(n +
1)
*
4
、
Consider a population of voters
uniformly
Distributed along
the ideological spectrum from left (x=o) to
right(x=1).Each of the candidates for a
single office
simultaneously chooses a
campaign platform(i.e.,a point on
the
line between x=0 and x=1). The voters observe the
c
andidates’
choices,and then each voter votes for the
candidate whose platform is closest to
the voter’s position on
thespectrum. If
there are two candidates and they
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