Who Bears the Cost of a Factory's Pollution: A Civics and Economics Case
A fictional coastal city has a chemical factory that employs 900 people and pays 15% of the city's tax revenue. The factory discharges wastewater that has raised the cost of treating the city's drinking water by 300 million yen a year, borne by all residents through water bills. Downstream fishermen report smaller catches. The factory says it cannot afford a 500 million yen treatment plant without cutting jobs. The city assembly debates (A) ordering the factory to install the plant or close, (B) paying half the plant's cost from city funds, or (C) leaving it to a voluntary agreement.
1. Explain the 'externality' in this case and why option C tends to underperform.
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The factory's production imposes costs (water treatment, lost catches) on people who did not agree to them - a negative externality. Because the factory does not pay these costs, its private cost is below the true social cost, so it over-produces pollution relative to what is socially efficient. Option C (voluntary agreement) relies on the polluter to internalize costs it has no legal duty to bear; with 900 jobs and 15% of tax revenue at stake, the city has weak leverage and residents cannot easily monitor compliance. Judgement: voluntary agreements can work where trust and monitoring are strong, but here the incentive is to delay. A or B makes the polluter pay, correcting the price signal.
2. Compare A and B on efficiency, jobs, and fairness, and recommend one.
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A (install or close) makes the polluter pay fully - efficient and fair to residents, and it protects the water and fishery. But if the factory truly cannot afford it, closure destroys 900 jobs and 15% of tax revenue, a large shock. B (city pays half) keeps jobs and cleans the water, but residents pay twice: once through water bills and again through taxes, and it rewards the polluter. Judgement: a conditional version of A is best - require the plant, but allow a phased schedule and a low-interest loan rather than a grant, so the polluter still bears the cost while avoiding sudden closure. This preserves the 'polluter pays' principle, which is the fairness core, while managing the transition cost. Pure B breaks the principle; pure C avoids the issue.