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. 80 72 Supply (10 firms) 64 56 48 Demand Supply (20 firms) 40 32 Supply (30 firms) 24 16 120 240 360 480 600 720 840 960 1080 1200 QUANTITY (Thousands of tons) If there were 10 firms in this market, the short-run equilibrium price of steel would be $ per ton. At that price, firms in this industry would Therefore, in the long run, firms would the steel market. Because you know that competitive firms earn economic profit in the long run, you know the long-run equilibrium price must be per ton. From the graph, you can see that this means there will be firms operating in the steel 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 positive accounting profit. True False PRICE (Dollars per ton)

ENGR.ECONOMIC ANALYSIS
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ISBN:9780190931919
Author:NEWNAN
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Chapter1: Making Economics Decisions
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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.
80
72
Supply (10 firms)
64
56
48
Demand
Supply (20 firms)
40
32
Supply (30 firms)
24
16
120
240
360
480
600
720
840
960
1080 1200
QUANTITY (Thousands of tons)
If there were 10 firms in this market, the short-run equilibrium price of steel would be $
per ton. At that price, firms in this industry would
Therefore, in the long run, firms would
the steel market.
Because you know that competitive firms earn
economic profit in the long run, you know the long-run equilibrium price must be
per ton. From the graph, you can see that this means there will be
firms operating in the steel 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 positive accounting profit.
True
False
PRICE (Dollars per ton)
Transcribed Image Text: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. 80 72 Supply (10 firms) 64 56 48 Demand Supply (20 firms) 40 32 Supply (30 firms) 24 16 120 240 360 480 600 720 840 960 1080 1200 QUANTITY (Thousands of tons) If there were 10 firms in this market, the short-run equilibrium price of steel would be $ per ton. At that price, firms in this industry would Therefore, in the long run, firms would the steel market. Because you know that competitive firms earn economic profit in the long run, you know the long-run equilibrium price must be per ton. From the graph, you can see that this means there will be firms operating in the steel 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 positive accounting profit. True False PRICE (Dollars per ton)
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