Question

In: Economics

A profit maximizing firm in a competitive market is currently producing 100 units of output. It...

A profit maximizing firm in a competitive market is currently producing 100 units of output. It has average revenue of $10, average total costs of $8, and a fixed costs of $200.

  1. What is its profit, marginal cost, and average variable cost?
  2. Is the efficient scale of the firm more than, less than, or exactly 100 units?

Solutions

Expert Solution

  1. What is its profit, marginal cost, and average variable cost?

  1. Profit

Profit = (P – ATC) × Q.

           = ($10 – $8) × 100 = $200

  1. Marginal cost

For firms in perfect competition, MR = AR. Since profit maximization also implies that MR = MC, thus MC must be $10.

  1. Average variable cost

First of all we need to find AFC.

AFC = $200/100 = $2.

AVC = ATC - AFC

AVC = $8 - $2 = $6

  1. Is the efficient scale of the firm more than, less than, or exactly 100 units?

Since ATC < MC, ATC must be rising. Therefore, the efficient scale must occur at an output level less than 100.


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