The meaning of contestability and contestable markets

Contestability describes the extent to which a market allows new businesses to enter and compete, regardless of the current number of firms operating in it. This concept focuses on the potential for competition rather than the actual level of rivalry present.

Features of a contestable market

• Low barriers to entry and exit - New firms can join or leave the market easily without facing significant obstacles or costs.
• Attraction of new entrants - If existing firms earn unusually high profits, this encourages newcomers to enter and capture a share.
• Potential for short-term high profits - New firms may achieve above-normal profits initially, but competition can reduce these over time.
• Threat to existing firms - Established businesses face constant pressure from possible new competitors, especially if they generate large profits.

In such markets, the possibility of new entrants keeps prices in check, as existing firms avoid setting rates that might draw in rivals.

Barriers to entry and exit that affect market contestability

The level of contestability in a market largely depends on how easy it is for new firms to enter or leave. High barriers reduce contestability by protecting existing firms from competition, while low barriers increase it by making entry more feasible.

Barriers to entry

• Patents on products or methods - Legal protections prevent other firms from copying innovations, giving established businesses a strong advantage.
• Strong brand loyalty from advertising - Heavy promotion by current firms builds customer attachment, making it hard for newcomers to gain market share.
• Limit pricing strategies - Existing firms may lower prices temporarily to deter entrants, creating fear of aggressive price competition.
• Trade restrictions - Measures like tariffs or quotas limit foreign firms from competing fairly in domestic markets.
• Vertical integration - When firms control multiple stages of production, it becomes difficult for new entrants to access necessary resources or markets.
• Limited access to supplies or networks - New firms may struggle to obtain raw materials or distribution channels dominated by incumbents.

Barriers to exit

High barriers to exit, such as significant unrecoverable costs, also lower contestability by discouraging potential entrants who fear the risks of failure.

The role of sunk costs in contestability

Sunk costs are expenses that a firm cannot recover if it decides to leave a market. These costs act as a barrier to exit and influence how contestable a market is.

Sunk costs include investments in specialised machinery that cannot be resold or money spent on marketing campaigns with no ongoing value. High sunk costs raise the risk of entering a market, as firms could lose substantial amounts if they fail and exit. Markets with high sunk costs are less contestable because potential competitors are reluctant to take on the financial risks involved.

When sunk costs are low, markets become more open to new firms, increasing overall contestability.

Hit-and-run tactics in contestable markets

In markets with high contestability, new firms can employ strategies to enter temporarily, make profits, and exit without long-term commitment. This approach exploits short-term opportunities while minimising risks.

Characteristics of hit-and-run tactics:

• Firms join the market when high profits are available, often due to low entry barriers.
• Once prices fall to normal levels due to increased rivalry, firms leave to avoid losses.
• The strategy works if earnings during the entry period exceed the combined costs of entering and exiting the market.

These tactics highlight how low barriers enable flexible competition, putting pressure on established firms to maintain efficient operations.

How contestability influences firm behaviour and efficiency

The degree of contestability shapes how existing firms operate, encouraging strategies that prioritise long-term stability over short-term gains. This dynamic promotes better resource use across the market.

Effects on incumbent firm behaviour

• Pricing decisions - Firms may keep prices moderate to avoid attracting new competitors, sacrificing immediate high profits for sustained earnings.
• Barriers creation - Established businesses might invest in advertising or signal readiness for price wars to discourage entrants, while adhering to legal limits on anti-competitive practices.
• Response to threats - The risk of new rivals pushes firms to focus on efficiency to protect their position.

Long-term market outcomes

In contestable markets, ongoing competition drives firms towards key efficiencies:

• Productive efficiency - Firms produce at the lowest possible cost to remain competitive as excess profits are eroded.
• Allocative efficiency - Resources are directed to meet consumer needs effectively, with prices reflecting true costs.
• Normal profit settlement - Over time, supernormal profits disappear, leaving firms with just enough returns to stay in business.

This process ensures markets adapt dynamically, benefiting consumers through lower prices and better choices.