Edexcel A-Level Economics B 9EB0
Scarcity, Choice and Potential Conflicts
Enterprise, Business and the Economy
Introducing the Market
The Role of Credit in the Economy
Market Failure and Government Intervention
Revenue, Costs, Profits and Cash
Business Growth and Competitive Advantage
Firms, Consumers and Elasticities of Demand
Productive Efficiency
Life in a Global Economy
The Economic Cycle
Introduction to Macroeconomic Policy
Globalisation
Economic Factors in Business Expansion
Impact of Globalisation on Global Companies
Impact of Globalisation on Local and National Economies
Global Labour Markets
Inequality and Re-Distribution
Competition and Market Power
Market Power and Market Failure
Market Failure Across the Economy
Macroeconomic Policies and Impact on Firms and Individuals
Risk and the Financial Sector
Competition and Market Power
Perfect competition and what the model explains
- 3 things to know
- Papers 1 and 3
Overview
Perfect competition as a benchmark, how supernormal profit is eroded and losses remove firms, normal profit, long-run price and average cost, pressure to cut costs, real markets close to perfect competition, online marketplaces, prices compared with monopoly, freedom of entry and exit, perfect information, advertising, and long-run efficiency.
What you need to know
Answer each one before you reveal it.
How is supernormal profit eroded in a perfectly competitive market?
What happens in a perfectly competitive market when firms are making losses?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Why is perfect competition used as a benchmark when no real market matches it?
Model answer
It shows the outcome markets move towards when competition is at its strongest, so real markets can be judged by how far they fall short of it.
- 2
How is supernormal profit eroded in a perfectly competitive market?
Model answer
High profits attract new entrants, market supply rises, price falls, and profit is competed away until only normal profit remains.
- 3
What happens in a perfectly competitive market when firms are making losses?
Model answer
Firms leave the industry, market supply falls, price rises, and the remaining firms return to earning normal profit.
- 4
What is normal profit?
Model answer
Normal profit is the minimum return needed to keep a firm in its industry, and it is counted as part of the firm's costs.
- 5
What does the model predict about the long-run relationship between price and average cost?
Model answer
Price is driven down to the minimum of average cost, so firms earn only normal profit in the long run.
- 6
How does perfect competition explain the pressure on firms to cut costs?
Model answer
Every firm must accept the same market price, so the only way to survive or gain is to produce at a lower cost than rivals.
Other ways to work this
The same content, four other ways.
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