Public policies for negative externalities seek to make private decision-makers account for costs imposed on others. Governments may use command-and-control regulation or market-based policies such as corrective taxes and tradable permits to reduce harmful activities or align private incentives with social costs.

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Approaches to address negative externalities aim to internalize the external costs, thereby aligning private incentives with social costs. These solutions are broadly classified into two categories: private solutions, which involve negotiation and agreements between the affected parties, and public policies, where a government intervenes through regulation, taxation, or other market-based mechanisms.

Solutions to Negative Externalities

Private solutions resolve externality problems through the actions of individuals or firms without direct government intervention. These methods can include moral codes, social sanctions, charitable activities, and the integration of businesses to internalize the externality. A key theoretical framework for private solutions is the Coase theorem, which posits that parties can reach an efficient outcome through private contracts and bargaining if transaction costs are low.

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