What are public solutions to externalities?

• A. Relying solely on market forces and leaving externalities unaddressed for the market to self-correct.
• B. Voluntary contracts, charitable donations, and corporate social responsibility initiatives by firms and individuals.
• C. Private bargaining through assignment of property rights and Coasean negotiations between affected parties.
• D. Government interventions such as Pigouvian taxes, subsidies, regulations, and tradable permits (cap-and-trade).

Answer: (D)

Verified step by step guidance

1. Step 1: Understand what externalities are — these are costs or benefits from economic activities that affect third parties and are not reflected in market prices.
2. Step 2: Recognize that when externalities exist, markets may fail to allocate resources efficiently, leading to overproduction or underproduction of certain goods or services.
3. Step 3: Identify that public solutions involve government interventions designed to correct these market failures and align private incentives with social costs or benefits.
4. Step 4: Learn about specific government tools such as Pigouvian taxes (taxes on negative externalities), subsidies (for positive externalities), regulations (rules limiting harmful activities), and tradable permits (cap-and-trade systems that limit total pollution).
5. Step 5: Understand how these interventions work to internalize externalities by making private decision-makers bear the social costs or receive the social benefits, thereby improving overall economic efficiency.