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Competition and Market Power

Barriers to entry, market structure and economies of scale

  • 3 things to know
  • Papers 1 and 3

Overview

How barriers to entry shape market structure and what happens when they fall, economies of scale, internal economies including purchasing and technical, internal against external economies, the long-run average cost curve, minimum efficient scale and the number of firms, calculating average cost, economies not passed on, and scale as a barrier to entry.

What you need to know

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Key term

What happens to market structure when barriers to entry fall?

Key term

What are economies of scale?

Key term

Name four internal economies of scale.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    How do high barriers to entry shape market structure?

    Model answer

    They keep the number of firms small and protect incumbents' profits, so the market tends towards oligopoly or monopoly.

  2. 2

    What happens to market structure when barriers to entry fall?

    Model answer

    New firms enter, concentration falls, prices are competed down and the market moves towards imperfect or perfect competition.

  3. 3

    What are economies of scale?

    Model answer

    Economies of scale are the reductions in long-run average cost that come from producing on a larger scale.

  4. 4

    Name four internal economies of scale.

    Model answer

    Technical, purchasing, managerial and financial economies of scale.

  5. 5

    What are purchasing economies of scale?

    Model answer

    A large buyer orders in bulk and negotiates a lower price per unit from suppliers, which cuts the cost of every item it sells.

  6. 6

    What are technical economies of scale?

    Model answer

    Larger plant and specialised machinery spread capital costs over more units and allow processes that would be too big for a small producer.

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