Transcription of Externalities: Problems and Solutions
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Externalities: Problems and Solutions
externalities : Problems and Solutions131 Undergraduate Public EconomicsEmmanuel SaezUC Berkeley1 OUTLINEC hapter Externality Private-Sector Solutions to Negative Public-Sector Remedies for Distinctions Between Price and Quantity Approaches toAddressing Conclusion2 externalities : Problems AND SOLUTIONSM arket failure: A problem that violates one of the assump-tions of the 1st welfare theorem and causes the market econ-omy to deliver an outcome that does not maximize efficiencyExternality: externalities arise whenever the actions of oneeconomic agent make another economic agent worse or betteroff, yet the first agent neither bears the costs nor receives thebenefits of doing so:Example: a steel plant that pollutes a river used for recreationExternalities are one example of market failure3 EXTERNALITY THEORY: ECONOMICS OFNEGATIVE PRODUCTION EXTERNALITIESN egative production externality: When a firm s productionreduces the well-being of others who are not compensated bythe marginal cost (PMC): The direct cost to producersof producing an additional unit of a goodMarginal Damage (MD): A
Why price pollution at MD? Because this is the equilibrium e cient price in the newly created pollution market. 2) Firms owners: If river is owned by rms then rm can charge individuals for polluting less. They will also charge individuals the MD per unit of pollution. Final level of pollution will be the same in 1) and 2) 14
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