Market Failure and Government Intervention
Market Failure Introduction (Y12)
Q: What is market failure?
A: Market failure occurs when the free market leads to an inefficient allocation of resources, causing a loss of economic and social welfare.
Q: What are the main types of market failure?
A: Externalities, public goods, information gaps, and lack of competition.
Q: Why does market failure matter in economics?
A: It highlights where government intervention may be needed to improve efficiency and welfare.
Q: What is allocative efficiency?
A: Allocative efficiency occurs when resources are distributed in a way that maximizes societal welfare.
Q: How does the price mechanism fail in market failure?
A: It fails to reflect the true social costs or benefits of goods and services, leading to inefficiency.
Negative Externalities (Y12)
Q: What are negative externalities?
A: Negative externalities are costs experienced by third parties due to an economic activity, which are not accounted for in the price of goods or services.
Q: Example of a negative externality?
A: Air pollution from factories affecting public health and the environment.
Q: How do negative externalities lead to market failure?
A: They cause overproduction and overconsumption of goods, resulting in a welfare loss.
Q: What is the marginal external cost (MEC)?
A: The additional cost imposed on third parties by producing or consuming one more unit of a good.
Q: What is a possible government solution to negative externalities?
A: Taxes on polluting activities or goods, like a carbon tax.
Q: How can tradable pollution permits reduce negative externalities?
A: By capping total emissions and allowing firms to trade permits, incentivizing lower pollution.
Positive Externalities (Y12)
Q: What are positive externalities?
A: Positive externalities are benefits to third parties from an economic activity that are not reflected in the price of goods or services.
Q: Example of a positive externality?
A: Education benefits society by creating a more skilled and productive workforce.
Q: How do positive externalities lead to market failure?
A: They cause underproduction and underconsumption of goods, leading to a welfare loss.
Q: What is the marginal external benefit (MEB)?
A: The additional benefit received by third parties from producing or consuming one more unit of a good.
Q: What is a possible government solution to positive externalities?
A: Subsidies for beneficial activities like education or healthcare.
Public Goods
Q: What are the characteristics of public goods?
A: Non-excludability and non-rivalry.
Q: Why do public goods cause market failure?
A: Because of the free-rider problem, where individuals benefit without paying, leading to under-provision of these goods.
Q: Example of a public good?
A: National defense or street lighting.
Q: How does non-rivalry in public goods differ from private goods?
A: Non-rivalry means one person’s consumption does not reduce the amount available for others, unlike private goods.
Q: What is a quasi-public good?
A: A good that has some characteristics of public goods but can be partially excludable or rivalrous, like toll roads.
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Q: How can governments provide public goods?
A: By using taxation to fund and produce them.
Information Gaps
Q: What are information gaps?
A: Situations where one party in a transaction has more or better information than the other, leading to inefficiencies.
Q: Example of an information gap?
A: A used car seller knows the car has defects, but the buyer is unaware.
Q: How do information gaps cause market failure?
A: They lead to adverse selection, where resources are not allocated efficiently.
Q: What is adverse selection?
A: A situation where one party exploits better information to the detriment of another, often seen in insurance markets.
Q: How can technology help reduce information gaps?
A: By improving access to information, such as online reviews and comparison websites.
Q: Why might firms not voluntarily disclose all relevant information?
A: To protect competitive advantages or to avoid revealing flaws that could reduce demand.