Moderate

A public good ?

Correct answer: C. Has the properties of being non-excludable and non-diminishable

  • A. Is provided by the government
  • B. Is free
  • C. Has the properties of being non-excludable and non-diminishable
  • D. Gas external costs

Explanation

A public good is normally defined as non-excludable and non-rival, meaning people cannot easily be kept from using it and one person's use does not substantially reduce another's. Option c uses “non-diminishable” as an imperfect synonym for non-rival.

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Individual consumers, firms and markets are examined through demand and supply, elasticity, consumer choice, production, costs, revenue and the determination of prices and output. The topic also covers market structures such as perfect competition, monopoly and oligopoly, plus market failure, externalities and the distinction between microeconomic decisions and economy-wide outcomes.

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