80 72 3 56 PRICE (Dollars per pound) 13 48 40 z 16 0 Q 0 Demand 0 20 D True > 4 False > ✓ 0 Ο Δ D 4 O A Δ 0 120 240 360 480 600 720 840 960 1080 1200 QUANTITY (Thousands of pounds) Screen Shot 2023-02-21 at 8.23.43 PM Supply (10 firms) Supply (20 firms) If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be would earn a positive profit . Therefore, in the long run, firms would enter Supply (30 firms) D ® Q Search Because you know that competitive firms earn zero ▾ economic profit in the long run, you know the long-run equilibrium price must be $52 per pound. From the graph, you can see that this means there will be 30 firms operating in the ruthenium industry in long-run equilibrium. $40 per pound. At that price, firms in this industry the ruthenium market. True or False: Assuming implicit costs are positive, each of the firms operating in this industry in the long run earns negative accounting profit. If there were 30 firms in this market, the short-run equilibrium price of ruth would earn a positive profit. Therefore, in the long run, firms would Becau earn a positive profit titive firms earn zero economic pro e graph, you can see that this means there wi shut down operate at a loss earn zero profit equilib True o Screen Shot 2023-0 it costs are positive, each of the firms operati If there were 30 firms in this market, the short-run equilibrium price of ruth would earn a positive profit. Therefore, in the long run, firms would Because you know that competitive firms earn zero economic pro $52 per pound. From the graph, you can see that this means there w equilibrium. Because you know that competitive firms earn zero $52 per pound. From the graph, you can equilibrium. True or False: Assuming implicit costs are posit If there were 30 firms in this market, the short-run equilibrium price of ruthenium w would earn a positive profit. Therefore, in the long run, firms would Screen Shot 2023- Screen Shot 2023-02-2 True zero positive negative economic profit in the means there will be 30 the firms operating in thi Screen Shot 2023-02-2 C Because you know that competitive firms earn zero economic profit in t $52 per pound. From the graph, you can see that this means there will be equilibrium. True or False: Assuming implicit costs are positive, each of the firms operating in

ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
Publisher:NEWNAN
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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Please check/fix the answers I have and complete the problem.

 

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O O O
PRICE (Dollars per pound)
Q
80
72
64
56
48
8
0
A
☐ ● A
Demand
■ >> A
0
O True
False
s
●
0 120 240 360
A
Screen Shot 2023-02-21 at 8.23.43 PM ✓
A
600 720 840 960 1080 1200
QUANTITY (Thousands of pounds)
4
Supply (10 firms)
Supply (20 firms)
Supply (30 firms)
If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be
would earn a positive profit Therefore, in the long run, firms would
enter
v
?
D
Q Search
Because you know that competitive firms earn zero
economic profit in the long run, you know the long-run equilibrium price must be
$52 per pound. From the graph, you can see that this means there will be 30 firms operating in the ruthenium industry in long-run
equilibrium.
$40 per pound. At that price, firms in this industry
the ruthenium market.
True or False: Assuming implicit costs are positive, each of the firms operating in this industry in the long run earns negative accounting profit.
Q
1
If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be
would earn a positive profit Therefore, in the long run, firms would
enter
Becau earn a positive profit titive firms earn
equilib
True o
shut down
operate at a loss
earn zero profit
Q
Q
economic profit in the long run, you know the long-run equilibrium price must be
e graph, you can see that this means there will be 30 firms operating in the ruthenium industry in long-run
1
If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be
would earn a positive profit. Therefore, in the long run, firms would
enter
Q
it costs are positive, each of the firms operating in this industry in the long run earns negative accounting profit.
Because you know that competitive firms earn zero
economic prof
$52 per pound. From the graph, you can see that this means there wi
equilibrium.
2
Because you know that competitive firms earn
$52 per pound. From the graph, you can
equilibrium.
True or False: Assuming implicit costs are posit
O True
Screen Shot 2023-02-21 at 8.23.52 PM
zero
If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be
would earn a positive profit ▼ Therefore, in the long run, firms would
enter
2
zero
zero
positive
Screen Shot 2023-02-21 at 8.23.58 PM ✓
Screen Shot 2023-02-21 at 8.24.04 PM ✓
2
(1)
negative
zero
Q Search
$40 per pound. At that price, firms in this industry
the ruthenium market.
enter
exit
neither enter nor exit
ñ
Screen Shot 2023-02-21 at 8.24.10 PM ✓
10
Q Search
$40 per pound. At that price, firms in this industry
the ruthenium market.
economic profit in the long run, you know the long-run equilibrium price must be
s means there will be 30 firms operating in the ruthenium industry in long-run
30
the firms operating in this industry in the long run earns negative accounting profit.
how the long-run equilibrium price must be
ting in the ruthenium industry in long-run
Q Search
$40 per pound. At that price, firms in this industry
the ruthenium market.
Because you know that competitive firms earn
economic profit in the long run, you know the long-run equilibrium price must be
$52 per pound. From the graph, you can see that this means there will be 30 firms operating in the ruthenium industry in long-run
equilibrium.
Q Search
True or False: Assuming implicit costs are positive, each of the firms operating in 20 ustry in the long run earns negative accounting profit.
Transcribed Image Text:O O O PRICE (Dollars per pound) Q 80 72 64 56 48 8 0 A ☐ ● A Demand ■ >> A 0 O True False s ● 0 120 240 360 A Screen Shot 2023-02-21 at 8.23.43 PM ✓ A 600 720 840 960 1080 1200 QUANTITY (Thousands of pounds) 4 Supply (10 firms) Supply (20 firms) Supply (30 firms) If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be would earn a positive profit Therefore, in the long run, firms would enter v ? D Q Search Because you know that competitive firms earn zero economic profit in the long run, you know the long-run equilibrium price must be $52 per pound. From the graph, you can see that this means there will be 30 firms operating in the ruthenium industry in long-run equilibrium. $40 per pound. At that price, firms in this industry the ruthenium market. True or False: Assuming implicit costs are positive, each of the firms operating in this industry in the long run earns negative accounting profit. Q 1 If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be would earn a positive profit Therefore, in the long run, firms would enter Becau earn a positive profit titive firms earn equilib True o shut down operate at a loss earn zero profit Q Q economic profit in the long run, you know the long-run equilibrium price must be e graph, you can see that this means there will be 30 firms operating in the ruthenium industry in long-run 1 If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be would earn a positive profit. Therefore, in the long run, firms would enter Q it costs are positive, each of the firms operating in this industry in the long run earns negative accounting profit. Because you know that competitive firms earn zero economic prof $52 per pound. From the graph, you can see that this means there wi equilibrium. 2 Because you know that competitive firms earn $52 per pound. From the graph, you can equilibrium. True or False: Assuming implicit costs are posit O True Screen Shot 2023-02-21 at 8.23.52 PM zero If there were 30 firms in this market, the short-run equilibrium price of ruthenium would be would earn a positive profit ▼ Therefore, in the long run, firms would enter 2 zero zero positive Screen Shot 2023-02-21 at 8.23.58 PM ✓ Screen Shot 2023-02-21 at 8.24.04 PM ✓ 2 (1) negative zero Q Search $40 per pound. At that price, firms in this industry the ruthenium market. enter exit neither enter nor exit ñ Screen Shot 2023-02-21 at 8.24.10 PM ✓ 10 Q Search $40 per pound. At that price, firms in this industry the ruthenium market. economic profit in the long run, you know the long-run equilibrium price must be s means there will be 30 firms operating in the ruthenium industry in long-run 30 the firms operating in this industry in the long run earns negative accounting profit. how the long-run equilibrium price must be ting in the ruthenium industry in long-run Q Search $40 per pound. At that price, firms in this industry the ruthenium market. Because you know that competitive firms earn economic profit in the long run, you know the long-run equilibrium price must be $52 per pound. From the graph, you can see that this means there will be 30 firms operating in the ruthenium industry in long-run equilibrium. Q Search True or False: Assuming implicit costs are positive, each of the firms operating in 20 ustry in the long run earns negative accounting profit.
7. Short-run supply and long-run equilibrium
Consider the competitive market for ruthenium. Assume that no matter how many firms operate in the industry, every firm is identical and faces the
same marginal cost (MC), average total cost (ATC), and average variable cost (AVC) curves plotted in the following graph.
COSTS (Dollars per pound)
80
72
64
56
48
40
32
24
16
8
0
0
3
MC
ATC
0
0
AVC
☐
☐
6 9 12 15 18 21 24
QUANTITY (Thousands of pounds)
27
30
The following graph plots the market demand curve for ruthenium.
(?)
Use the orange points (square symbol) to plot the initial short-run industry supply curve when there are 10 firms in the market. (Hint: You can
disregard the portion of the supply curve that corresponds to prices where there is no output since this is the industry supply curve.) Next, use the
purple points (diamond symbol) to plot the short-run industry supply curve when there are 20 firms. Finally, use the green points (triangle symbol) to
plot the short-run industry supply curve when there are 30 firms.
Transcribed Image Text:7. Short-run supply and long-run equilibrium Consider the competitive market for ruthenium. Assume that no matter how many firms operate in the industry, every firm is identical and faces the same marginal cost (MC), average total cost (ATC), and average variable cost (AVC) curves plotted in the following graph. COSTS (Dollars per pound) 80 72 64 56 48 40 32 24 16 8 0 0 3 MC ATC 0 0 AVC ☐ ☐ 6 9 12 15 18 21 24 QUANTITY (Thousands of pounds) 27 30 The following graph plots the market demand curve for ruthenium. (?) Use the orange points (square symbol) to plot the initial short-run industry supply curve when there are 10 firms in the market. (Hint: You can disregard the portion of the supply curve that corresponds to prices where there is no output since this is the industry supply curve.) Next, use the purple points (diamond symbol) to plot the short-run industry supply curve when there are 20 firms. Finally, use the green points (triangle symbol) to plot the short-run industry supply curve when there are 30 firms.
Expert Solution
Step 1

Perfect competition is a type of market structure in which there are large number of buyers and sellers for a homogenous commodity. A perfectly competitive firm is a price taker and can sell any quantity of the commodity at the market determined price. 

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