Property Rights & Pollution Permits (Cambridge (CIE) A Level Economics): Revision Note

Property rights and pollution permits

• Property rights are legally enforced entitlement that defines who owns a resource and how it may be used, transferred or exchanged

• Many market failures arise because property rights over resources are absent or poorly defined

  • When no one owns a resource - such as clean air, ocean fish stocks, or a rainforest - no one has an incentive to manage it sustainably

  • This leads to over-exploitation: the private cost of using the resource is below the social cost, generating a negative externality

• Governments can correct this by assigning property rights over previously unowned resources, giving the rights-holder a direct incentive to manage the resource efficiently

  • This internalises the externality - the cost of degrading the resource falls on the owner rather than on society

• Pollution permits are the most important application of this principle in economics

  • They create tradeable property rights over the right to emit pollution

• Pollution permits are a government-issued licence that gives the holder the legal right to emit a specified quantity of pollution

  • Permits are tradeable, allowing firms to buy and sell them so that emissions reductions are made where they are least costly

Property rights

• When property rights are assigned over a common access resource:

  • The owner has an incentive to prevent over-exploitation — degrading the resource reduces its future value to the owner

  • The negative externality is internalised — private costs rise to reflect social costs

  • Output is reduced towards the socially optimal level where MSB = MSC

International examples of property rights

• Fishing rights: New Zealand and Iceland pioneered Individual Transferable Quotas (ITQs) - tradeable property rights over a share of the total allowable fish catch

  • Rights-holders have a direct incentive to protect stock as it determines the future value of their quota

• Forest rights: Community forest management programmes in Nepal and Mexico have assigned property rights over forest resources to local communities

  • This has dramatically reducing illegal logging and deforestation rates compared to state-managed forests

Evaluating property rights

Pollution permits

• A pollution permit (also called a cap-and-trade scheme) creates a tradeable property right over the right to emit a specified quantity of pollution

  • The government sets a total emissions cap - the maximum quantity of pollution permitted across all firms in the scheme

  • This cap is divided into individual permits, each allowing the holder to emit one unit of pollution

• Permits are allocated to firms, who may then

  • Use them to cover their own emissions

  • Sell surplus permits if they reduce emissions below their allocation

  • Buy additional permits if they wish to emit more than their allocation allows

• The price of permits is determined by supply and demand in the permit market

  • The government fixes the quantity (the cap) and the market determines the price

Diagram analysis

• The emissions cap sets the total quantity of pollution permitted

  • This is fixed by the government and represents the socially optimal level of total emissions

• Company Y reduces its emissions below its allocation

  • It invests in cleaner technology and sells its surplus permits, generating revenue

• Company X finds it cheaper to buy permits than to reduce its own emissions

  • It purchases Company Y's surplus permits

• The permit price is determined by supply and demand:

  • If abatement is cheap for most firms, permit demand is low and the price falls

  • If abatement is costly, permit demand is high and the price rises, incentivising investment in cleaner technology

• If the permit price exceeds the cost of adopting green technology, firms will switch to cleaner production — the market automatically incentivises innovation

International examples of pollution permits

• EU Emissions Trading System (ETS): the world's largest carbon market, covering energy, industry and aviation across EU member states — the cap has been tightened progressively to drive emissions reductions

• South Korea's Emissions Trading Scheme: established in 2015, covering around 70% of national greenhouse gas emissions across industry, energy and buildings

Evaluating pollution permits

Permits vs regulation vs taxation: key comparison