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2. Outline: Market Failure. Sources of Market FailurePublic goodsdefinitionmarket provisionoptimal provisioninformation failureVickery auctions and Clarke-Groves taxes. 3. Sources of Market Failure. Asymmetric (private) informationExternalitiesPublic goodsMarket power. 4. Public Goods:
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1. 1 Lecture 7 Part IIa: Paper 1General Equilibrium and Welfare EconomicsDr Hamish Low
2. 2 Outline: Market Failure Sources of Market Failure
Public goods
definition
market provision
optimal provision
information failure
Vickery auctions and Clarke-Groves taxes
3. 3 Sources of Market Failure Asymmetric (private) information
Externalities
Public goods
Market power
4. 4 Public Goods: Examples National defense: all inhabitants are simultaneously protected
Radio broadcast: received simultaneously by all listeners in range of the transmitter
If many consumers benefit from a single unit of provision the fundamental theorems do not apply
competitive market may not reach Pareto efficient allocation
not all Pareto efficient allocations are achievable by the market
5. 5 Public Goods Definition A pure public good satisfies:
Nonexcludability If the public good is supplied, no consumer can be excluded from consuming it
Nonrivalry Consumption of the public good by one consumer does not reduce the quantity available for consumption by any other
A private good is excludable at no cost and is perfectly rivalrous
6. 6