The following diagram shows the market demand for steel. Use the orange points (square symbol) to plot the short-run industry supply curve when there are 20 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 40 firms. Finally, use the green points (triangle symbol) to plot the short-run industry supply curve when there are 60 firms. PRICE (Dollars per ton) 80 72 Supply (20 firms) 64 58 Demand 48 Supply (40 firms) 40 32 2 24 16 8 ° 0 120 240 360 480 600 720 840 960 1080 1200 QUANTITY OF OUTPUT (Thousands of tons) Supply (60 firms) ? If there were 60 firms in this market, the short-run equilibrium price of steel would be $ Therefore, in the long run, firms would Because you know that perfectly competitive firms earn be $ per ton. At that price, firms in this industry would the steel market. economic profit in the long run, you know the long-run equilibrium price must firms operating in the steel industry in long-run equilibrium. per ton. From the graph, you can see that this means there will be

Microeconomic Theory
12th Edition
ISBN:9781337517942
Author:NICHOLSON
Publisher:NICHOLSON
Chapter12: The Partial Equilibrium Competitive Model
Section: Chapter Questions
Problem 12.6P
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The following diagram shows the market demand for steel.
Use the orange points (square symbol) to plot the short-run industry supply curve when there are 20 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 40 firms. Finally, use the green points (triangle symbol) to plot the
short-run industry supply curve when there are 60 firms.
PRICE (Dollars per ton)
80
72
Supply (20 firms)
64
58
Demand
48
Supply (40 firms)
40
32
2
24
16
8
°
0
120
240 360 480 600 720 840 960 1080 1200
QUANTITY OF OUTPUT (Thousands of tons)
Supply (60 firms)
?
If there were 60 firms in this market, the short-run equilibrium price of steel would be $
Therefore, in the long run, firms would
Because you know that perfectly competitive firms earn
be $
per ton. At that price, firms in this industry would
the steel market.
economic profit in the long run, you know the long-run equilibrium price must
firms operating in the steel industry in long-run equilibrium.
per ton. From the graph, you can see that this means there will be
Transcribed Image Text:The following diagram shows the market demand for steel. Use the orange points (square symbol) to plot the short-run industry supply curve when there are 20 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 40 firms. Finally, use the green points (triangle symbol) to plot the short-run industry supply curve when there are 60 firms. PRICE (Dollars per ton) 80 72 Supply (20 firms) 64 58 Demand 48 Supply (40 firms) 40 32 2 24 16 8 ° 0 120 240 360 480 600 720 840 960 1080 1200 QUANTITY OF OUTPUT (Thousands of tons) Supply (60 firms) ? If there were 60 firms in this market, the short-run equilibrium price of steel would be $ Therefore, in the long run, firms would Because you know that perfectly competitive firms earn be $ per ton. At that price, firms in this industry would the steel market. economic profit in the long run, you know the long-run equilibrium price must firms operating in the steel industry in long-run equilibrium. per ton. From the graph, you can see that this means there will be
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