ChainWhat it assumes · how to break it
Start
A chemical factory discharges waste into a river, harming fishing businesses and households downstream who play no part in the factory's sales.
1
As a result, the cost of the pollution falls on households living near the factory and the river, who are not compensated.
external cost
external cost
Assumes: The pollution is local.
But: Some pollution, such as carbon emissions, spreads widely, so the cost is not concentrated near the site.
2
Since housing near polluting sites tends to be cheaper, lower-income households are more likely to live there.
income inequality · housing market
income inequality · housing market
Assumes: Poorer households live closest to pollution.
But: Some polluting sites are in rural or mixed areas, so higher-income households may also be affected.
3
Consequently, lower-income households bear a larger share of the external cost relative to their income, through poorer health and loss of amenity.
distribution of external costs
distribution of external costs
Assumes: Health harm is linked to how close people live to the source.
But: Where harm depends on other factors, such as diet or work, the extra burden on nearby households may be small.
4
At the same time, the gains from production, profits for shareholders and cheaper goods for consumers, go mostly to people who do not live near the site.
distribution of benefits
distribution of benefits
Best link to attack
Assumes: Owners and customers live elsewhere.
Assumes: Owners and customers live elsewhere.
But: The factory may be a major local employer, so nearby households also gain through wages.
5
Therefore, the outcome is unfair: those who gain from production do not pay its full cost, while those who bear the cost gain little from it.
equity · polluter pays principle
equity · polluter pays principle
Assumes: Fairness means those who cause harm should pay for it.
But: People hold different views of fairness, and some argue cheaper goods benefit everyone, including the households that bear the pollution.
End
The outcome is inequitable: the cost of pollution falls on nearby, often lower-income households, while the gains go mainly to others.
Evaluation chain
- E1However, whether the outcome is unfair depends on whether local households also share in the gains from production.
- E2If the factory is the main employer in the area, many households near the river earn their wages from it.
- E3As a result, the people who bear the pollution also receive part of the benefit, and closing the factory would cost them their jobs.
- E4So the outcome is less unfair than it first appears for employed local households, though residents who do not work there still bear the cost with no gain.
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Questions this answers
- Explain why negative externalities may lead to an unfair distribution of costs.
- Discuss whether the costs of pollution fall mainly on lower-income households.
- Assess the case for making polluters pay on grounds of equity.
Diagram
No standard diagram. Use evidence on where polluting sites are located relative to local incomes, or the MSC and MPC diagram to show the size of the external cost.
Reverse and related
Positive externality → third parties gain benefits for free, which can widen or narrow inequality depending on who lives nearby.