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CHAPTER
5| Externalities, Environmental Policy, and Public Goods
Brief Chapter Summary and Learning Objectives 5.1
Externalities and Economic Efficiency (pages 134–137) Identify examples of positive and negative externalities and use graphs to show how externalities affect economic efficiency. ▪ ▪
5.2
A negative externality is a cost that affects someone who is not directly involved in the production or consumption of a good or service. A positive externality is a benefit that affects someone who is not directly involved in the production or consumption of a good or service.
Private Solutions to Externalities: The Coase Theorem (pages 137–143) Discuss the Coase theorem and explain how private bargaining can lead to economic efficiency in a market with an externality. ▪
5.3
The Coase theorem states that if transactions costs are low, private bargaining can result in an efficient solution to the problem of externalities.
Government Policies to Deal with Externalities (pages 143–147) Analyze government policies to achieve economic efficiency in a market with an externality. ▪
When private solutions to externalities are not feasible, government intervention in the form of a tax (negative externality) or subsidy (positive externality) can bring about an efficient level of output.
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