Wize University Microeconomics Textbook > Economic Efficiency and Government Intervention
Government Intervention

Government Intervention with Natural Monopolies
The government can try to correct a natural monopoly in 3 ways.
Natural Monopoly Regulation
A natural monopoly is one in which the ATC (Average Total Cost) is always falling. This means that the MC (Marginal Cost) must lie ________ the ATC.

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1. Marginal Cost Pricing

- Marginal cost pricing is when the business produces at the output where Price = MC (Marginal Cost)
- In the diagram above this would be at an output of ________ units and a price of ________.
- However, at this output level, the ATC is ________ which means the profit is ________ (which is a loss).
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2. Two Part Tariff
- In a two part tariff the business will produce where Price = MC
- If each good sells at marginal cost then Total Revenue (TR) = Total Variable Cost (TVC). This means the losses are the fixed costs.
- Producer surplus = TR - TVC so in this case producer surplus = ________
- The business can charge a one time fee that covers the total fixed costs and then the firm will break even. Example: Sandra owns a gym with a marginal cost of $10 per month per client (water and electricity) and fixed costs of $50,000 per year (rent). If she is expecting 1,000 clients per year, she would charge a monthly fee of ________ and a yearly membership fee of ________ .
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3. Average Cost Pricing

- In average cost pricing the Price = ATC
- In the diagram above, this would be at an output of ________ units and a price of ________.
- However, at this output since Price is ________ to MC it is not allocatively efficient.

Example: Government Intervention with Natural Monopolies
Producer Surplus is:
a) TR – TC
b) TR – TFC
c) Economic Profits
d) TR – TVC
D.
Producer surplus is total revenue (TR) minus total variable cost (TVC). This tells us how much the business is making on top of their day to day costs.