Which characteristic applies to a public good?

Prepare for the AP Microeconomics exam on Market Failure and the Role of Government with detailed quizzes featuring multiple-choice questions, hints, and explanations. Master your understanding and ace the test!

Multiple Choice

Which characteristic applies to a public good?

Explanation:
Public goods are defined by two properties: non-excludability and non-rivalry. Non-excludable means you can’t feasibly prevent people from benefiting once the good is provided, even if they don’t pay. Non-rivalrous means one person’s consumption does not reduce the amount available for others. Because of these features, private markets tend to underprovide public goods since individuals can free-ride, relying on others to pay. That’s why governments often supply or finance them through taxes. In contrast, a private good is excludable and rivalrous: you can keep non-payers out, and one person’s use reduces another’s. A common resource is non-excludable but rivalrous: you can’t easily exclude anyone, but one person’s use can reduce others’ enjoyment. A club or toll good is excludable and non-rivalrous: you can restrict access, and one person’s use doesn’t significantly affect others (up to capacity limits).

Public goods are defined by two properties: non-excludability and non-rivalry. Non-excludable means you can’t feasibly prevent people from benefiting once the good is provided, even if they don’t pay. Non-rivalrous means one person’s consumption does not reduce the amount available for others. Because of these features, private markets tend to underprovide public goods since individuals can free-ride, relying on others to pay. That’s why governments often supply or finance them through taxes.

In contrast, a private good is excludable and rivalrous: you can keep non-payers out, and one person’s use reduces another’s. A common resource is non-excludable but rivalrous: you can’t easily exclude anyone, but one person’s use can reduce others’ enjoyment. A club or toll good is excludable and non-rivalrous: you can restrict access, and one person’s use doesn’t significantly affect others (up to capacity limits).

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