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market structures perfect competition
A LevelEconomics~5 min read
Overview
This lesson explores Perfect Competition, an idealized market structure characterized by numerous small firms, homogeneous products, and free entry and exit. We will analyze its assumptions, short-run and long-run equilibrium, and its implications for efficiency.
Assumptions of Perfect Competition
Perfect competition is built upon several strict assumptions, which are rarely met in the real world but provide a useful benchmark for comparison. These assumptions include: * **Many Buyers and Sellers:** There are so many individual buyers and sellers that no single participant can influence th...
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Key Concepts
- Perfect Competition: A theoretical market structure with many small firms, identical products, and no barriers to entry or exit.
- Homogeneous Products: Goods that are identical across all firms, making them perfect substitutes.
- Price Taker: A firm in perfect competition that has no control over the market price and must accept it as given.
- Short-Run Equilibrium: A period where firms can adjust output but not fixed factors, potentially earning supernormal, normal, or subnormal profits.
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Exam Tips
- →Clearly distinguish between the short-run and long-run equilibrium conditions. Remember that supernormal profits and losses are only sustainable in the short run.
- →Be able to draw and label the short-run and long-run diagrams for a perfectly competitive firm and industry. Ensure all curves (MR, AR, MC, ATC, AVC) are correctly positioned and labelled.
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