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School
University of Toronto *
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Course
316
Subject
Economics
Date
Apr 3, 2024
Type
Pages
4
Uploaded by CaptainFlowerMole21 on coursehero.com
University
of
Toronto
ECO316:
Applied
Game
Theory
Instructor:
Stanton Hudja
Problem
Set
3
Problem
1
Consider
a
variant
of
Hotelling’s
model
with
two
parties
in
which
the
voters’
preferences
are
asymmetric.
Specifically,
suppose
that
each
voter
cares
twice
as
much
about
policy
dif-
ferences
to
the
left
of
her
favorite
position
than
about
policy
differences
to
the
right
of
her
favorite
position.
For
example,
suppose
that
the
position
of
party
1
is
0.2
and
the
position
of
party
2
is
0.5
.
Then
a
citizen
whose
favorite
position
is
0.35
prefers
party
2
to
party
1,
and
a
citizen
whose
favorite
position
is
0.3
is
exactly
indifferent
between
the
two
parties
(because
the
distance
between
her
favorite
position
and
the
position
of
party
1
is
exactly
half
of
the
distance
between
her
favorite
position
and
the
position
of
party
2).
How does the Nash equilibrium differ from the Nash equilibrium of Hotelling’s model?
1
In a standard Hotelling model, the Nash equilibrium is where both parties choose to be at the median to capture the largest portion of the symmetric distribution of voters. However, when the voters’ preferences are asymmetric, which means the distribution of the voters are not symmetric anymore, the parties might not targeting the median because it cannot guarantee to capture the maximum votes as possible. In this case, a party might move slightly to the position where there are more voters. For example, to the left of the median if more voters prefer that position. Also, the Nash equilibrium will not be at the median, it will depends on how the preferences of the voters are distributated.
Problem
2
In
class
I
discussed
the
variant
of
Hotelling’s
model
in
which
the
two
parties
care
only
about
the
position
of
the
winner
(and
not
at
all
about
winning).
I
considered
the
case
in
which
party
1’s
favorite
position
is
to
the
left
of
the
median,
࠵?
,
of
the
citizens’
favorite
positions
and
party
2’s
favorite
position
is
to
the
right
of
࠵?
.
I
claimed
that
in
this
case,
the
only
Nash
equilibrium
is
the
action
pair
in
which
both
parties
choose
࠵?
.
Why
is
the
action
pair
in
which
party
1
chooses
࠵?
and
party
2
chooses
her
favorite
position
not
a
Nash
equilibrium?
Problem
3
Consider
the
citizen-candidate
model.
Assume
࠵?
<
࠵?
.
Does
the
game
have
a
Nash
equilib-
rium
in
which
exactly
one
candidate
enters
and
does
so
at
a
position
different
from
࠵?
?
Problem
4
Does
the
citizen-candidate
model
have
a
Nash
equilibrium
in
which
there
are
two
candi-
dates,
both
of
whose
favorite
positions
are
࠵?
?
Problem
5
An
interesting
possibility
in
the
citizen-candidate
model
is
that
there
is
a
Nash
equilibrium
in
which
a
candidate
loses.
To
make
the
argument
simple,
consider
a
very
special
distri-
bution
of
preferences
that
is
very
different
from
the
ones
considered
in
class.
The
range
of
possible
positions
is
from
0
to
1.
Forty
percent
of
citizens
have
favorite
position
0,
5%
have
favorite
position
0.25,
15%
have
favorite
position
0.6,
and
40%
have
favorite
position
1.
Figure
1:
The
Distribution
of
the
Citizens’
Favorite
Positions
in
Problem
6.
See Figure 1. The Positions of the three candidates are indicated in red color. No citizen
has a favorite position different from 0, 0.25, 0.6, and 1. Suppose that three citizens enter as
2
payoff
of
whining
as
the
only
candidate
is
negative
No
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