i guess that the circumference of the earth is about: 1. 5,000 miles 2. 10,000 miles 3. 15,000 miles...
Post on 22-Dec-2015
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I guess that the circumference of the earth is about:
5,00
0 m
iles
10,0
00 m
iles
15,0
00 m
iles
25,
000 m
iles
30,0
00 m
iles
35,0
00 m
iles
45,0
00 m
iles
55,0
00 m
iles
65,0
00 m
iles
75,0
00 m
iles
2% 2%
4%
24%
4%
14%
13%
11%
15%
12%
1. 5,000 miles
2. 10,000 miles
3. 15,000 miles
4. 25, 000 miles
5. 30,000 miles
6. 35,000 miles
7. 45,000 miles
8. 55,000 miles
9. 65,000 miles
10. 75,000 miles
The circumference of the earth is about:
5,00
0 m
iles
10,0
00 m
iles
15,0
00 m
iles
25,
000 m
iles
30,0
00 m
iles
35,0
00 m
iles
45,0
00 m
iles
55,0
00 m
iles
65,0
00 m
iles
75,0
00 m
iles
1% 0%
3%
59%
2%4%
3%3%
16%
9%
1. 5,000 miles
2. 10,000 miles
3. 15,000 miles
4. 25, 000 miles
5. 30,000 miles
6. 35,000 miles
7. 45,000 miles
8. 55,000 miles
9. 65,000 miles
10. 75,000 miles
Firms in an industry have $500 fixed costs, variable costs of $20 per unit, and capacity of 50 units. In the long run there is free entry and
exit. What is the long run equilibrium price?
20 50 30 25
13%5%
79%
3%
1. $20
2. $50
3. $30
4. $25
A competitive firm has fixed costs of $10,000, capacity of 1000 and variable costs
of $5 per unit. In the short run if the price of
the good falls from $15 to $7.50, the firm will
Pro
duce z
ero
Pro
duce 1
000
units
Pro
duce 5
00 u
nits
.
Pro
duce 2
50 u
nits
.
13%3%
11%
73%
1. Produce zero
2. Produce 1000 units
3. Produce 500 units.
4. Produce 250 units.
A competitive firm has fixed costs of $10,000, capacity of 1000 and variable costs
of $5 per unit. In the short run if the price of
the good falls from $15 to $4, the firm will
Pro
duce z
ero
Pro
duce 1
000
units
Pro
duce 5
00 u
nits
.
Pro
duce 2
50 u
nits
.
83%
1%3%13%
1. Produce zero
2. Produce 1000 units
3. Produce 500 units.
4. Produce 250 units.
If the demand curve is a downward-sloping straight line, then the
elasticity of demand is the same everywhere along the line.
Tru
e
Fal
se
29%
71%1. True
2. False
Why is that?
• The elasticity of demand is NOT the slope of the demand curve. It is the ratio of percentage change in quantity to percentage change in price.
• Read p 411 of textbook to see how to calculate elasticity along a straight line demand curve.
The price elasticity of demand for rental housing is –1, and the price elasticity of supply is +1/4.
Municipal authorities set a rent ceiling 20% below the equilibrium price. The number of units
rented
Incr
ease
s by
20%
.
Dec
reas
es b
y 20
%.
Dec
reas
es b
y 5%
.
Incr
ease
s by
25%
.
Dec
reas
es b
y 10
%.
18%15%
4%10%
52%
1. Increases by 20%.
2. Decreases by 20%.
3. Decreases by 5%.
4. Increases by 25%.
5. Decreases by 10%.
Why is that?
• The price quantity combination moves along the supply curve. (Landlords are not compelled to rent.)
• Since supply elasticity is ¼ , a 20% fall in price leads to a 5% fall in quantity supplied.
The supply curve is horizontal at $10. The demand curve has formula P=100-
Q. A sales tax of $10 per unit is imposed.
What is the excess burden of this tax?
20 30 40 50 60
49%
16%
2%
23%
10%
1. $20
2. $30
3. $40
4. $50
5. $60
Here is the picturePrice
Quantity
100
100
$10
$20
A
Slope of demand curve is –1.Excess burden is Triangle AArea of A is 10x10/2=50
P=100-Q