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8. Short-run supply and long-run equilibrium Consider the competitive market for rhodium. 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) 30,90 100 90 ㅁ 80 70 60 50 40 30 ATC ° 20 10 MC AVC 0 0 + 5 10 15 20 25 30 36 40 45 50 QUANTITY (Thousands of pounds) The following graph plots the market demand curve for rhodium. 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. PRICE (Dollars per pound) 100 90 80 70 60 50 40 Demand 30 20 10 0 0 125 250 375 500 625 750 875 1000 1125 1250 QUANTITY (Thousands of pounds) --- Supply (10 firms) Supply (20 firms) Supply (30 firms) If there were 10 firms in this market, the short-run equilibrium price of rhodium would be would Therefore, in the long run, firms would per pound. At that price, firms in this industry the rhodium market. Because you know that competitive firms earn economic profit in the long run, you know the long-run equilibrium price must be per pound. From the graph, you can see that this means there will be firms operating in the rhodium 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. True False

8. Short-run supply and long-run equilibrium Consider the competitive market for rhodium. 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) 30,90 100 90 ㅁ 80 70 60 50 40 30 ATC ° 20 10 MC AVC 0 0 + 5 10 15 20 25 30 36 40 45 50 QUANTITY (Thousands of pounds) The following graph plots the market demand curve for rhodium. 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. PRICE (Dollars per pound) 100 90 80 70 60 50 40 Demand 30 20 10 0 0 125 250 375 500 625 750 875 1000 1125 1250 QUANTITY (Thousands of pounds) --- Supply (10 firms) Supply (20 firms) Supply (30 firms) If there were 10 firms in this market, the short-run equilibrium price of rhodium would be would Therefore, in the long run, firms would per pound. At that price, firms in this industry the rhodium market. Because you know that competitive firms earn economic profit in the long run, you know the long-run equilibrium price must be per pound. From the graph, you can see that this means there will be firms operating in the rhodium 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. True False

Principles of Economics (MindTap Course List)
Principles of Economics (MindTap Course List)
8th Edition
ISBN:9781305585126
Author:N. Gregory Mankiw
Publisher:N. Gregory Mankiw
Chapter14: Firms In Competitive Markets
Section: Chapter Questions
Problem 9PA
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PRICE (Dollars per pound) 8. Short-run supply and long-run equilibrium Consider the competitive market for rhodium. 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) 30,90 100 90 80 70 60 50 40 ATC 30 20 AVC 10 MC 0 0 + 5 10 15 20 25 30 35 40 45 50 QUANTITY (Thousands of pounds) The following graph plots the market demand curve for rhodium. 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. 100 90 80 70 60 50 40 Demand 30 20 10 0 0 125 250 375 500 625 750 875 1000 1125 1250 QUANTITY (Thousands of pounds) Supply (30 firms) Supply (20 firms) !••• Supply (10 firms) If there were 10 firms in this market, the short-run equilibrium price of rhodium would be $ would . Therefore, in the long run, firms would per pound. At that price, firms in this industry ▼the rhodium market. Because you know that competitive firms earn economic profit in the long run, you know the long-run equilibrium price must be per pound. From the graph, you can see that this means there will be firms operating in the rhodium 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. True False
Transcribed Image Text:PRICE (Dollars per pound) 8. Short-run supply and long-run equilibrium Consider the competitive market for rhodium. 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) 30,90 100 90 80 70 60 50 40 ATC 30 20 AVC 10 MC 0 0 + 5 10 15 20 25 30 35 40 45 50 QUANTITY (Thousands of pounds) The following graph plots the market demand curve for rhodium. 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. 100 90 80 70 60 50 40 Demand 30 20 10 0 0 125 250 375 500 625 750 875 1000 1125 1250 QUANTITY (Thousands of pounds) Supply (30 firms) Supply (20 firms) !••• Supply (10 firms) If there were 10 firms in this market, the short-run equilibrium price of rhodium would be $ would . Therefore, in the long run, firms would per pound. At that price, firms in this industry ▼the rhodium market. Because you know that competitive firms earn economic profit in the long run, you know the long-run equilibrium price must be per pound. From the graph, you can see that this means there will be firms operating in the rhodium 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. True False
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