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AnswerTu09.pdf
AnswerTu09
.pdf
School
University of Technology Sydney
*
*We aren't endorsed by this school
Course
BUSINESS 23567
Subject
Economics
Date
Dec 19, 2024
Pages
7
Uploaded by DoctorGerbilPerson99
in
of
Q1
.
(a)
.
·
Market
Demand
:
Mark's
Demand
John's
Demand
Market's
Demand
Px
Pa
P
-
10
-
"y
Jo--
-
j
-
j
-
-
..
"w
Sh
↓
x
5
10
-
2 p
=
x
10
-
p
=
x
9
X
=
&john
=
10-P
if
p
=
5
X
=
<john
+
Kark
=
20-3P
if
p
<
5
·
Market
Supply
:
X
=
(n
+
xp
=
(5
+
p)
+
(5
+
2p)
=
10
+
34
X
=
10
+
Sp
P
-
10
.
i
x
510
In
Egm
:
20 -3p
=
10
+
3p
=
6p
=
1
=
4
*
=
**
=
20
-
3x
=
15
(b)
.
·
Need
to
find
the
profit
of
firms
base
on
p
=
p
+
=
Y
·
But
we
don't
know
the
long-run
costs
of
two
firms
,
(like
the
costs
of
capital
and
Labor)
.
Therefore
,
we
cannot
answer
this
question
.
Q2
.
(a)
.
The
total
traded
is
1000
And
each
firm
produces
10
units
number
of
firms
=
100%
Im
(b)
·
A
market
is
in
a
long-run
equ
if
there
is
no
entry
or
exit
of
firms
.
For
each
firm
,
P
=
10
is
their
break-even
price
in
long
run
.
It
means
that
their
profit
is
when
P
=
10
·
so
no
firm
entry
or
exit
.
Yes
(c)
(d)
(i)
↓
t
~
Ac
4 -
-
-
--
---
0
The
introduction
of
the
License
fee
implies
an
increase
in
the
long-run
costs
.
:
CRAC
curve
shifts
upward
(ACR-
>
AC
?
)
②
In
short
run
,
this
fee
is
kind
like
a
fixed
cost
,
So
AVCSR
doesn't
change
.
③
The
License
fee
is
fixed
,
so
the
MC
of
firms
doesn't
change
in
neither
LR
nor
SR
.
=>
The
supply
curve
in
LR
and
SR
stoy
same
.
④
Since
ACR
increase
,
the
exit
price
increase
as
well
.
when
P
=
10
,
firms
have
negative
profit
.
=>
firms
start
exiting
the
market
=
I
number
of
firms
l
in
SR
+
:
S"
in
panel
a
shift
to
SM
New
price
⑤
This
new
price
is
new
break-even
price
and
new
supply
curve
in
panel
C
.
(ii)
The
number
of
firms
↓
.
The
egu
total
quantity
in
this
market
↓
(in
panel
as
and
cl
,
but
the
producing
quantity
by
each
firm
↑
(in
panel
bl
.
The
number
of
firms
↓
.
n
=
total
matty
individual
quantity
·
>
Q 3
.
(a)
Find
the
ext
price
,
and
comparing
with
the
current
price
.
·
Mc
=
Al
=
Y
*
E
"
AC(
x*
)
=
P
↑
Ac
=
x
=
c
-
5x
+
x
Al
=
Mc
=
)
10
-
5X
+
x
=
10
-
10x
+
3x
2x
-
5x
=
0
X
.
(2X
-
5)
o
X
=
0
,
or
X
=
Y
-
PE
AL
(x
=
+(2)
=
10
-
5
.
+
15)
=
10
-
4
+
=
j4
&
P
=
20
>=
PBE
↑
·
Profit
is
positive
,
then
more
firms
will
entry
.
Supply
&
=
PL
to
PBE
=
B
.
(b)
PA
sin
>
(C)
Demand
:
X
=
20
-
44
&
supply
:
p
=
4
=>
X
*
=
20
-
4x
=
5
Egm
:
PA
&