Ch. 10 Externalities Flashcards
Externality
A side effect of an activity that affects bystanders whose interests aren’t taken into account
Negative Externality
A side effect that harms bystanders
Positive Externality
A side effect that benefits bystanders
Private Interest
Costs and benefits you incur
Societys Interest
All costs and benefits between you and others
Marginal Private Cost
Extra cost the seller incurs to procure one more unit
Marginal External Cost
Cost imposed on bystanders from producing one more unit
Marginal Social Cost
All marginal costs = marginal private costs + marginal external costs
Marginal Private Benefit
Extra benefit enjoyed by a buyer with one more unit
Marginal External Benefit
External benefit given to bystanders from one more unit
Marginal Social Benefit
All benefits = marginal private benefits + marginal external benefits
Socially Optimal Quantity
Outcome that is most efficient for society as a whole
Rational Rule for Society
Produce more of an item as long as its marginal social benefit is greater than or equal to marginal social cost
Coase Theorem
If people can bargain costly and legal rights are clear, externality problems can be solved
Corrective Tax
Tax designed to induce people to take account of the negative externalities they cause