1. Externalities Market Failures: When the Market Fails

2. Market Failures Examples of Market Failures Collusion Price fixing Predatory pricing Externalities Occur when the market fails to allocate resources efficiently T-Shirts Without a market failure, when S = D, Social Welfare is maximized

3. Reading #1 Externalities

4. Reading #1: Externalities Negative Externality Negative Externality?

5. EXTERNALITY Summary An externality is the uncompensated impact of a person/business on another person/society –Both positive & negative externalities exist –All externalities are market failures Spillover Costs- costs that fall on society –Occur with negative externalities –Cause production to be too high Spillover Benefits- benefits that fall on society –Occur with positive externalities –Cause production to be too low

6. Factory A Factory B

7. Negative Externalities –Automobile exhaust –Cigarette smoking –Barking dogs (loud pets) –Loud stereos in apartments –Noisy Students –Neighbor’s poorly maintained property –Pollution

8. Positive Externalities –Immunizations –Restored historic buildings –Research into new technologies –Neighbor’s well maintained property –Volunteer work

9. Correcting Externalities Government action can correct a market failure –Taxes & subsidies are the primary tools Negative externalities lead markets to overproduce –correct by Gov’t taxing externality Positive externalities lead markets to under-produce –correct by Gov’t subsidizing externality

10. Correcting a negative externality Soda Can Production Assume Soda Can production causes pollution Tax Soda cans the amount of spillover cost Supply shifts left New equilibrium is socially efficient Price rises & quantity produced falls E2E2 S2S2 ----------- ------------------ P2P2 Q2Q2

11. Externality Questions

12. Externality Review Private Costs gas, insurance, repair Social Costs (spillover cost) pollution, traffic, noise

13. Bottled Water What is the real cost? Start 20 minutes in…

14. Documentary

16. Only 11 states have recycle deposits Only 20% of U.S. bottles are recycled

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19. Negative Externality: Global Warming: Government Regulation –raise pollution standards globally –Critical thinking: Should countries all have the same standards? Free Market Solution: Cap & Trade –Government creates a system of trading pollution credits –Provides incentive to not pollute