Market Failures and Externalities: Summary Notes

Negative Externalities

• Cause: Overproduction/overconsumption creates external costs not in market prices.
• Example: Air pollution from factories.
• Solutions:
  • Taxes
  • Regulations
  • Pollution permits
  • Public awareness

Positive Externalities

• Cause: Underproduction/underconsumption misses external benefits.
• Example: Free vaccinations.
• Solution:
  • Subsidies
  • Direct government provisions
  • Public Awareness Campaigns

Common Access Resources & Tragedy of the Commons

• Common Access Resources:
  • Natural resources free for public use but can be overused/depleted.
  • Examples: Forests, fisheries, air
• Tragedy of the Commons:
  • Overuse of resources leads to depletion/environmental damage.
  • Individuals act in self-interest.
  • Example: Overfishing
  • Solutions:
    *Regulations and quotas
    *Property rights
    *Carbon taxes and emissions trading
    *Public awareness campaigns

Public Awareness Role

• Used to change consumer behavior and encourage sustainable consumption.
• Examples:
  • Anti-smoking campaigns (negative externality of consumption)
  • Reduce, reuse, recycle (negative externality of production)
  • Sustainable fishing (tragedy of the commons)

Key Takeaways

• Market failures: inefficient resource allocation.
• Negative externalities: overproduction/overconsumption, harming third parties.
• Positive externalities: underconsumption, reducing social benefits.
• Government intervention: corrects market failure.
• Common access resources: depletion due to overuse, requires regulation.
• Public awareness: changes consumer behavior.

Glossary of Key Terms

• Market failure: inefficient allocation of resources, net welfare loss.
• Externality: cost/benefit to a third party not in transaction.
• Negative externality: negative spillover, overproduction/overconsumption.
• Positive externality: beneficial spillover, underproduction/underconsumption.
• Marginal private cost (MPC): cost to firms/individuals in transaction.
• Marginal social cost (MSC): total cost to society.
• Marginal private benefit (MPB): benefit to consumers in transaction.
• Marginal social benefit (MSB): total benefit to society.
• Welfare loss (deadweight loss): loss due to market inefficiencies.
• Common access resources: non-excludable but rivalrous resources.
• Tragedy of the commons: overuse and depletion of common access resources.
• Government intervention: actions to correct market failures.
• Carbon tax: tax on greenhouse gas emissions.
• Tradable pollution permits: firms trade pollution allowances.
• Sustainable development: meets present needs without compromising future.