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# Calculating a competitive industry's long-run equilibrium

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A firm in a purely competitive industry is currently producing 1200 units per day at a total cost of \$600 . If the firm purchased 1000 units per day, its total cost would be \$400, and if it produced 700 units per day, its total cost would be \$375. What is the firms ATC per unit at these three levels of production? If every firm in this industry has the same cost structure, is the the industry in long-run competitive equilibrium? From what you know about these firms' cost structures, what is the highest possible price per unit that could exist as the market price in long-run equilibrium? If that price ends up being the market price and if the normal rate of profit is 10%, then how big will each firm's accounting profit per unit be?

https://brainmass.com/economics/general-equilibrium/calculating-a-competitive-industry-s-long-run-equilibrium-445461

#### Solution Preview

Average Total Cost (ATC) = Total Cost (TC)/Quantity of output (Q)

When Q = 1200, ATC = (600/1200=) \$0.50
When Q = 1000, ATC = (400/1000=) \$0.40
When Q = 700, ATC = (375/700=) \$0.54

In a perfectly competitive ...

#### Solution Summary

Given data on a typical firm's cost function, this solution shows how to calculate the market price for the industry in long-run equilibrium.

\$2.19

## Economic Factors

You want to start a company, and are trying to decide between two different industries. You are doing your final research before you write your business plan.

Industry A has 20 firms and a Concentration Ratio (CR) of 30%

â?¢What is the name for this type of industry?
â?¢Describe some of this industry's characteristics.
â?¢If you were in this industry and there was an increased demand for the product that pushed up the price of goods, what long-run adjustments would you expect?