Economics 9708/31 — May/June 2017

Background Concept

Market failure refers to a situation where the free market, left to itself, does not allocate resources efficiently, leading to a net welfare loss to society. Common causes of market failure include externalities (positive or negative), public goods, information asymmetry, and market power (e.g., monopoly). A negative externality exists when the production or consumption of a good or service imposes an external cost on third parties that is not accounted for in the market price. This results in overproduction and allocative inefficiency.

Understanding the Question

The question asks: 'What would be an example of a market failure?' It provides four options. The correct answer is the one that represents a situation where the market outcome is inefficient due to a market failure. The options cover:

• A: Higher prices for hotel rooms at holiday periods (a normal market response to increased demand).
• B: Noise pollution experienced near major airports (a negative externality).
• C: Periods of inflation when prices of all goods and services rise (a macroeconomic phenomenon, not a market failure per se).
• D: 20% of a country's population live in poverty (an inequality outcome, which may result from market failures but is not itself a market failure).

Only option B describes a market failure because it involves an external cost that leads to resource misallocation.

Approach

To answer, recall the definition of market failure. Evaluate each option against that definition. Option B is the only one that clearly involves a divergence between private and social costs, resulting in an inefficient outcome. Options A, C, and D are either normal market adjustments, macroeconomic issues, or distributional outcomes that are not inherently market failures.

Step-by-Step Reasoning

1. Option A: Higher prices for hotel rooms during holiday periods are a natural result of increased demand. This is a signal for resource allocation (more rooms may be built, or consumers are rationed by price). There is no market failure; it is an efficient price adjustment.

2. Option B: Noise pollution from airports is a negative externality. Airlines and passengers do not bear the full social cost of the noise (e.g., reduced property values, health impacts). The market price of air travel does not include this cost, so air travel is overproduced relative to the social optimum. This is a classic example of market failure (externality).

3. Option C: Inflation is a rise in the general price level. While it can have welfare effects, it is not a market failure in the allocative efficiency sense. Inflation is a macroeconomic phenomenon that can be caused by various factors, but it does not directly represent a failure of the price mechanism to allocate resources efficiently in a specific market.

4. Option D: Poverty is an outcome of the distribution of income and wealth. While poverty can be exacerbated by market failures (e.g., lack of access to credit, education), poverty itself is not a market failure. The market may allocate resources efficiently yet still result in inequality. Market failure is about inefficiency, not inequality.

Thus, only option B is an example of market failure.

Key Takeaways

• Market failure is about inefficiency, not inequality, inflation, or normal price fluctuations.
• Negative externalities are a key cause of market failure, leading to overproduction of goods that impose external costs.
• Recognising examples of market failure requires understanding the difference between private and social costs/benefits.

Common Mistakes

• Confusing market failure with any undesirable outcome. For example, inflation is undesirable but not a market failure.
• Thinking that poverty is a market failure. Poverty is a distributional issue, not necessarily an efficiency issue.
• Assuming that higher prices always indicate market failure. In competitive markets, higher prices due to demand shifts are efficient.

Things to Be Careful About

• Distinguish between market failure and government failure (when government intervention worsens outcomes).
• Be precise: a negative externality is a market failure because it causes a divergence between private and social costs, leading to allocative inefficiency.