Which of the following statements are true? (more than once could be correct, deductions for incorrect answers). A. Perfectly competitive markets with many buyers and sellers can normally internalize externalities via natural market forces and therefore do not normally call for policy intervention. B. Negative externalities cause too much production and consumption of a good relative to the social optimum while positive externalities cause too little production and consumption of a good relative to the social optimum. C. Negative externalities cause too little production and consumption of a good relative to the social optimum while positive externalities cause too much production and consumption of a good relative to the social optimum. D. Both positive and negative externalities in an otherwise perfectly competitive market cause deadweight loss. E. Negative externalities in otherwise perfectly competitive markets cause deadweight loss while positive externalities actually improve outcomes relative to a perfectly competitive outcome.

Essentials of Economics (MindTap Course List)
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Author:N. Gregory Mankiw
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Chapter11: Public Goods And Common Resources
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Which of the following statements are true? (more than once could be correct, deductions for incorrect answers).

A. Perfectly competitive markets with many buyers and sellers can normally internalize externalities via natural market forces and therefore do not normally call for policy intervention.

B. Negative externalities cause too much production and consumption of a good relative to the social optimum while positive externalities cause too little production and consumption of a good relative to the social optimum.

C. Negative externalities cause too little production and consumption of a good relative to the social optimum while positive externalities cause too much production and consumption of a good relative to the social optimum.

D. Both positive and negative externalities in an otherwise perfectly competitive market cause deadweight loss.

E. Negative externalities in otherwise perfectly competitive markets cause deadweight loss while positive externalities actually improve outcomes relative to a perfectly competitive outcome.
 
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