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EconomicsModule 1 of 8

The Firm and Market Structures

7

Concepts

6

Formulas

1

Decisions

5

Quiz Questions

Key Concepts

7 concepts covered in this module.

Perfect Competition

Many firms, identical products, no barriers to entry. Price takers. P = MR = MC in long run. Zero economic profit in LR.

Monopolistic Competition

Many firms, differentiated products, low barriers. Downward-sloping demand. Zero economic profit in LR due to entry.

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Formulas

6 essential formulas for this module.

Profit Maximization

MR = MC

Where: MR = marginal revenue, MC = marginal cost

Total Revenue

TR = P × Q

Where: P = price, Q = quantity

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Decision Frameworks

1 decision frameworks to guide your analysis.

Operate or Shut Down in Short Run?

  • Operate: P ≥ AVC (covers variable costs, contributes to fixed costs)
  • Shut down: P < AVC (better to produce nothing)

Mind Map

Visual overview of how concepts connect in this module.

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Perfect Competition

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Answer
Many firms, identical products, no barriers to entry. Price takers. P = MR = MC in long run. Zero economic profit in LR.
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