Presentation on theme: "Unit 5: Market Failures and Externalities"— Presentation transcript:
1Unit 5: Market Failures and Externalities Topic: Gov’t and Market FailureChapter: 30
2Learning TargetsI will be able to explain what externalities are and when they occur, and I can provide several possible solutions to externalities.
3Public Goods vs. Private Goods Produced by gov’tNon-rivalry (consumption by one does not mean others can’t have it)Non-excludability (no way to stop people from receiving it – free rider problem)Efficiency does not accurately reflect supply and demand.Produced by private firmsRivalry (consumption by one person may mean that others have to do without)Excludable (if you don’t pay, you don’t get it)Supply, demand and efficiency exist in these markets.
4ExternalitiesDef: positive and negative spillovers to a third party which were not intended in the original production plan.Can result from production of either public or private goods
5TermsCOSTSPrivate marginal cost: the actual “numerical” cost of production to the producer.Social marginal cost: the cost which spills over to society (ex. pollution).Total cost = private marginal cost + social marginal costBENEFITSPrivate marginal benefit: the benefit to consumers of the good (measured by utility; consumers pay prices according to utility).Social marginal benefit: the added benefit to society (consumers who don’t pay for the good); ex. immunizations.Total benefit = private marginal benefit + social marginal benefit
6Negative Externalities Occur when:there are spillover costs (someone other than the producer is “paying” for the good’s production).social marginal cost is greater than private marginal cost.marginal cost is greater than marginal benefit.there is an overallocation of resources to the good (too much of it is being produced).
7Negative Externality Steel S (social MC) Price/Cost S (private MC) Social costPrivate cost/price of goodD (private MB)Q(optimum)Q(market)Q
8What can the gov’t do for neg. externalities? Gov’t must discourage production by:Direct controls – laws that regulate the offending activity (ex. pollution prevention technology).Taxes – applied to firms that produce the harmful good (ex. taxing levels of pollution)
9Positive Externalities Occur when:there are spillover benefits(someone other than the consumer is “gaining” from the good’s consumption).social marginal benefit is greater than private marginal benefit.marginal benefit is greater than marginal cost.there is an underallocation of resources to the good (too little of it is being produced and consumed).
10Positive Externality Price/Cost Swine Flu Vaccines S (private MC) Social benefitPrivate benefit/price of goodD (social MB)D (private MB)Q(market)Q(optimum)Q
11What can gov’t do for pos. externalities? Gov’t must encourage production by:Subsidies to consumers – discounts, rebates and coupons (ex. cash for clunkers).Subsidies to sellers – reduces cost that the producer pays (↑ S will cause lower price for more consumers to be able to pay for it).Provide it as a public good – free for everyone
12Non-Gov’t Solutions to Mkt Failures Coase TheoremIf there are clearly-defined property rights and a small number of people involved, problems will work themselves out.Liability rules and lawsuitsClearly-defined property rights allow courts to rule on externality cases.Market-based approachDevelopment of a market for externality rights (ex. pollution permits)