Barriers to entry — Edexcel A-Level Economics B
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Barriers to entry explained
Barriers to entry covers 4 specification points, including a) Contestability and ease of entry and O product differentiation o branding o….
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Open a point below for its explanation and revision guidance.
a) Contestability and ease of entry
Contestability refers to the ease with which new firms can enter and exit a market. A perfectly contestable market has no barriers to entry or exit, meaning sunk costs are zero and new entrants have access to the same technology as incumbent firms. The threat of entry alone can force existing firms to price competitively (limit pricing) to deter new rivals, leading to productive and allocative efficiency even if the market is highly concentrated. For example, the budget airline industry is highly contestable because aircraft can be leased rather than bought, reducing sunk costs and making entry and exit relatively easy compared to traditional airlines.
b) Barriers to entry: o product differentiation o branding o start-up costs o intellectual property rights o R&D and technology change
Barriers to entry are obstacles that make it difficult for new firms to enter a market, protecting the monopoly power and supernormal profits of incumbent firms. Product differentiation and strong branding create loyalty, forcing entrants to spend heavily on marketing. High start-up costs, such as purchasing expensive capital equipment, deter firms lacking finance. Intellectual property rights, like patents and copyrights, legally prevent rivals from copying products. Finally, extensive research and development (R&D) and rapid technology change can create barriers if incumbents hold advanced, proprietary technology. For instance, pharmaceutical companies use patents and massive R&D budgets to block new entrants.
c) The impact of barriers to entry on market structure
Barriers to entry are obstacles making it difficult for new firms to enter a market. Their presence directly determines market structure. High barriers, such as significant capital requirements or patents, restrict competition and lead to concentrated structures like oligopolies or monopolies. For example, the pharmaceutical industry requires massive R&D investment, creating an oligopoly. Conversely, low barriers allow new firms to easily join the market, resulting in highly competitive structures such as perfect or monopolistic competition. When barriers are low, supernormal profits attract new entrants, which increases supply, drives down prices, and dilutes market concentration over time, preventing long-term monopoly power.
d) Economies of scale and their impact on cost and price
Economies of scale occur when a firm's long-run average costs fall as its scale of production increases. This acts as a significant barrier to entry because large incumbent firms can produce at a lower average cost than new, smaller entrants. For example, a massive car manufacturer benefits from technical economies by using expensive automated machinery, spreading fixed costs over millions of vehicles. This reduction in average cost allows the large firm to lower its selling price while maintaining profit margins, effectively undercutting new entrants who face higher average costs. Consequently, economies of scale dictate the cost structure of a business and give it the pricing power to dominate the market and deter potential competitors.
Your focus
- Define the concept of market contestability and ease of entry.
- Explain the conditions required for a market to be perfectly contestable.
- Analyse how the threat of entry affects the pricing and output decisions of incumbent firms.
Show all 12 objectives
- Identify different types of barriers to entry, including branding and start-up costs.
- Explain how intellectual property rights legally protect incumbent firms from new entrants.
- Analyse the role of R&D and technological change in creating and maintaining barriers to entry.
- Explain how different levels of barriers to entry determine the resulting market structure.
- Analyse the relationship between barriers to entry and the number of firms operating in a market.
- Evaluate the impact of changing barriers to entry on the degree of competition within an industry.
- Define economies of scale and explain how they reduce a firm's long-run average costs.
- Analyse how falling average costs allow firms to lower prices and gain a competitive advantage.
- Evaluate the role of economies of scale as a barrier to entry that protects incumbent firms from new competitors.
Barriers to entry exam tips
Marking Points
- Define contestability as the degree of ease of entry into and exit from a market.
- Identify that perfectly contestable markets have zero sunk costs.
- Explain that the threat of entry can influence the behaviour of incumbent firms, such as adopting limit pricing.
- Recognise that high contestability can lead to outcomes similar to perfect competition, such as normal profits in the long run.
- Identify product differentiation and branding as methods to create customer loyalty and increase entry costs for rivals.
- Explain how high start-up costs act as a structural barrier to entry.
- Describe how intellectual property rights provide legal monopolies and prevent imitation.
- Analyse how continuous R&D and technological change give incumbent firms a competitive advantage that is hard for new entrants to match.
- Identify how high barriers to entry lead to concentrated market structures like monopoly or oligopoly.
- Explain that low barriers to entry facilitate highly competitive markets such as perfect or monopolistic competition.
- Recognise that barriers to entry protect incumbent firms from new competition, allowing them to maintain supernormal profits in the long run.
- Evaluate how changes in barriers to entry can shift a market from a monopoly towards a more competitive structure.
- Define economies of scale as the reduction in long-run average costs as the scale of production increases.
- Explain how lower average costs enable firms to reduce prices, increasing their competitiveness and market share.
- Identify economies of scale as a structural barrier to entry that deters new firms unable to match the low costs of incumbents.
- Differentiate between internal economies of scale and their specific impacts on a firm's cost structure.
Examiner Tips
- 💡Always link contestability to the concept of sunk costs when evaluating market structures.
- 💡Use the threat of 'hit-and-run' entry to explain why incumbent firms might choose to make only normal profit.
- 💡When analysing real-world markets, evaluate how technological changes have increased contestability by lowering entry barriers.
- 💡Use specific examples of intellectual property, such as pharmaceutical patents, to illustrate legal barriers to entry.
- 💡Evaluate how the internet has lowered start-up costs for many retail businesses, reducing traditional barriers to entry.
- 💡Discuss how strong branding acts as an artificial barrier by making demand for the incumbent's product highly price inelastic.
- 💡When analysing market structure, always explicitly link the level of barriers to entry to the number of firms and the degree of competition.
- 💡Use specific examples of barriers, such as legal patents or structural economies of scale, to justify why a market is an oligopoly or monopoly.
- 💡Remember that in multiple-choice questions, the defining characteristic separating monopolistic competition from oligopoly is often the height of the barriers to entry.
- 💡Always specify average costs or unit costs rather than just costs when defining or discussing economies of scale.
- 💡In multiple-choice questions, look for scenarios where a firm uses its lower average costs to aggressively price out new entrants, demonstrating a barrier to entry.
- 💡Link specific types of economies of scale directly to how they reduce the firm's long-run average cost curve.
Common Mistakes
- Confusing contestability with competition. Correction: Competition refers to the number of firms currently in the market, whereas contestability refers to the threat of potential new entrants.
- Assuming contestable markets must have many firms. Correction: A monopoly or oligopoly can be highly contestable if barriers to entry and exit are low.
- Believing that all costs are barriers to exit. Correction: Only sunk costs (unrecoverable costs) act as barriers to exit and reduce contestability.
- Stating that all start-up costs are sunk costs. Correction: Start-up costs can include recoverable assets like vehicles; only unrecoverable costs (sunk costs) are absolute barriers to exit.
- Confusing patents with copyrights. Correction: Patents protect inventions and processes, whereas copyrights protect original artistic or literary works.
- Assuming barriers to entry are always illegal or anti-competitive. Correction: Many barriers, such as branding, R&D, and patents, are legal and can result from natural market dynamics or government policy.
- Assuming barriers to entry only affect new firms; correction: they also protect incumbent firms by reducing the threat of competition and safeguarding market share.
- Confusing barriers to entry with barriers to exit; correction: barriers to entry prevent firms from joining a market, whereas barriers to exit prevent them from leaving.
- Believing that monopolies always have absolute barriers to entry; correction: barriers can be high but not insurmountable, and technological changes can lower them over time.
- Confusing economies of scale with increased total production; correction: economies of scale specifically refer to a fall in average unit costs, not just producing more goods.
- Assuming economies of scale reduce total costs; correction: total costs increase as production rises, but the cost per unit or average cost falls.
- Stating that economies of scale only benefit the producer; correction: consumers can also benefit if the firm passes on the lower average costs in the form of lower retail prices.