National Defence as a Government-Provided Public Good
National defence is a classic example of a pure public good. It is non-rival because if one person is protected from foreign invasion, so is everyone else, and the marginal cost of extending this protection to an additional citizen is zero. It is also non-excludable, as it is impossible to prevent individuals within the country from benefiting. Consequently, providing national defence is considered a fundamental government responsibility.
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Introduction to Microeconomics Course
The Economy 2.0 Microeconomics @ CORE Econ
Ch.10 Market successes and failures: The societal effects of private decisions - The Economy 2.0 Microeconomics @ CORE Econ
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