- Public goods and externalities are examples of markets failure resulting from the complete absense of a market - problem of missing markets
- With a public good (light house) the market may just not exist
- Incentive function of prices breaks down
- impossible to exclude free-riders
Pure public goods - National defence and police - impossible to exclude 'free-riders'
Non-pure public goods - street lights, tv, radio, lighthouses - methods can be devised for converting the goods to private goods by excluding 'free-riders' by charging them for use
Most goods are private goods, possessing 2 important characteristics:
- The owners can excerise private property rights - preventing other people from using the good or consuming its benefits - excludability
- Benefits available to other people
Public good however do not possess these characterists - it is non-excludable and non-rival and therefore this leads to market failure
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