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 15 firms. Finally, use the green points (triangle symbol) to plot the short-run industry supply curve when there are 20 firms. 100 PRICE (Dollars per pound) 8 8 8 8 8 8 30 20 10 Demand 125 250 375 500 625 750 875 1000 1125 1250 QUANTITY (Thousands of counda) Supply (10 firms) Supply (15 firma) Supply (20 firms)

ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
Publisher:NEWNAN
Chapter1: Making Economics Decisions
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The following graph plots the market demand curve for rhenium.
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 15 firms. Finally, use the green points (triangle symbol) to
plot the short-run industry supply curve when there are 20 firms.
PRICE (Dollars per pound)
100
90
80
70
60
8
50
40
30
20
10
0
0 125 250 375 500 625 750 875 1000 1125 1250
QUANTITY (Thousands of counda)
Demand
Because you know that competitive firms earn
Supply (10 firms)
True
Supply (15 firms)
If there were 10 firms in this market, the short-run equilibrium price of rhenium would be 5
Therefore, in the long run, firms would
would
False
Supply (20 firms)
per pound. From the graph, you can see that this means there will be
Ⓡ
economic profit in the long run, you know the long-run equilibrium price must be
firms operating in the rhenium industry in long-run equilibrium.
True or False: Assuming implicit costs are positive, each of the firms operating in this industry in the long run earns negative accounting profit.
per pound. At that price, firms in this industry
the rhenium market.
Transcribed Image Text:The following graph plots the market demand curve for rhenium. 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 15 firms. Finally, use the green points (triangle symbol) to plot the short-run industry supply curve when there are 20 firms. PRICE (Dollars per pound) 100 90 80 70 60 8 50 40 30 20 10 0 0 125 250 375 500 625 750 875 1000 1125 1250 QUANTITY (Thousands of counda) Demand Because you know that competitive firms earn Supply (10 firms) True Supply (15 firms) If there were 10 firms in this market, the short-run equilibrium price of rhenium would be 5 Therefore, in the long run, firms would would False Supply (20 firms) per pound. From the graph, you can see that this means there will be Ⓡ economic profit in the long run, you know the long-run equilibrium price must be firms operating in the rhenium industry in long-run equilibrium. True or False: Assuming implicit costs are positive, each of the firms operating in this industry in the long run earns negative accounting profit. per pound. At that price, firms in this industry the rhenium market.
Homework (Ch 14)
7. Short-run supply and long-run equilibrium
Consider the competitive market for rhenlum. 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)
100
8
2 283 282 2
70
30
20
0
0
MC-D
10
ATC
AVC
30 40 50 60 10
QUANTITY (Thousands of pounds)
80
90 100
Transcribed Image Text:Homework (Ch 14) 7. Short-run supply and long-run equilibrium Consider the competitive market for rhenlum. 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) 100 8 2 283 282 2 70 30 20 0 0 MC-D 10 ATC AVC 30 40 50 60 10 QUANTITY (Thousands of pounds) 80 90 100
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