Market Failure and Public Goods Provision

Steps:

• Define public goods as non-excludable and non-rivalrous, meaning people can use them without paying and one person's use doesn't reduce availability for others.
• Identify the free-rider problem: individuals benefit without contributing, so private firms can't charge fees and thus won't produce them profitably.
• Recognize this as a market failure where the private sector underprovides essential goods like national defense or streetlights.
• Conclude that government steps in to provide and fund public goods through taxes to ensure societal benefit.

Why B is correct:

• Public goods suffer from the free-rider problem, making them unprofitable for private firms as they can't exclude non-payers, per the economic definition of non-excludability.

Why the others are wrong:

• A: Public goods benefit everyone simultaneously, like clean air, so they are used by all.
• C: Public goods aren't tied to monopolies; the issue is free-riding, not market structure.
• D: Public goods generate positive externalities or none, not large external costs like pollution.

Final answer: B