Growth costs and competing objectives
| English | Français |
|---|---|
| income inequality/ˈɪŋkʌm ɪniːˈkwɒlɪti/ | income inequality |
| emissions intensity | emissions intensity |
A decision you can investigate
- Cleaner production per unit can coexist with more total pollution when output rises fast enough. Average income can rise while a poorer group loses income.
- Compare totals and distributions before judging the growth outcome.
Build the explanation
- Resources devoted to investment or expansion have an opportunity cost: they could support current consumption or another public priority. Growth can increase pollution, habitat loss and resource depletion if activity expands faster than cleaner technology or regulation reduces damage. Rapid demand can raise imports and a trade deficit when domestic supply cannot meet expenditure, but export-led growth or import replacement may improve trade instead.
- Unequal ownership, skills or regional access can concentrate gains and increase income inequality 收入不平等. When aggregate demand outruns available supply, growth can accompany inflation, especially near capacity; productivity-led supply growth can relieve price pressure. These costs are conditional. Identify the growth source, time horizon, distribution and policy response rather than presenting growth as either universally harmful or costless.
Work through the evidence
- A fictional output index rises 100→120 and emissions per index unit fall 0.50→0.45. Total emissions rise from 50 to 54, an 8% increase, despite 10% lower intensity. Reducing intensity is progress but does not establish falling total emissions.
- In a separate two-household example, comparable real incomes change 20/80→18/102: mean rises 50→60, up 20%, while the lower income falls 10%. The top/bottom income ratio rises 4→5.67, demonstrating greater inequality in this deliberately small case.
- A capacity project costing 40 from a fixed resource budget 100 leaves 60 for other uses rather than 100; the forgone alternatives are its opportunity cost, although later benefits may justify it.
What are new total emissions?
120×0.45=54.
How does the lower household’s real income change?
(18−20)/20×100=−10%.
Falling emissions intensity always means falling total emissions.
Output scale can outweigh the lower emissions per unit.
Test the limits
- The fictional emissions calculation concerns one measured pollutant, not a complete ecological assessment or actual national data. Inequality measures and household needs vary; the two-person ratio illustrates distribution, not a national Gini estimate.
- An investment cost is not automatically a net social loss: compare future benefits, external effects and alternative uses. Import growth can reflect productive machinery with future export benefits; a trade deficit is not automatically unsustainable. Inflation risk depends on spare capacity, costs, expectations and supply response. Regulation, redistribution and cleaner innovation can reduce particular costs but themselves require resources and evaluation.
When is demand-led growth more likely to raise inflation?
Capacity constraints can make additional demand raise prices.
Apply and explain your answer
- Why do lower emissions per unit and higher mean income fail to establish that every outcome improves?
- Total emissions also depend on output scale, and the mean hides distribution. Here emissions rise 8% and the lower household’s real income falls 10%.
Match the terms to their meanings.
Use each term for its stated economic relationship.
Use the terms precisely
- emissions intensity 排放强度: Emissions per specified unit of output.
- income inequality: Differences in the distribution of income across people or groups.
A fictional output index rises 100→120 and emissions per index unit fall 0.50→0.45. Total emissions rise from 50 to 54, an 8% increase, despite 10% lower intensity. Reducing intensity is progress but does not establish falling total emissions. In a separate two-household example, comparable real incomes change 20/80→18/102: mean rises 50→60, up 20%, while the lower income falls 10%. The top/bottom income ratio rises 4→5.67, demonstrating greater inequality in this deliberately small case. A capacity project costing 40 from a fixed resource budget 100 leaves 60 for other uses rather than 100; the forgone alternatives are its opportunity cost, although later benefits may justify it.
The fictional emissions calculation concerns one measured pollutant, not a complete ecological assessment or actual national data. Inequality measures and household needs vary; the two-person ratio illustrates distribution, not a national Gini estimate. An investment cost is not automatically a net social loss: compare future benefits, external effects and alternative uses. Import growth can reflect productive machinery with future export benefits; a trade deficit is not automatically unsustainable. Inflation risk depends on spare capacity, costs, expectations and supply response. Regulation, redistribution and cleaner innovation can reduce particular costs but themselves require resources and evaluation.
Resources devoted to investment or expansion have an opportunity cost: they could support current consumption or another public priority. Growth can increase pollution, habitat loss and resource depletion if activity expands faster than cleaner technology or regulation reduces damage. Rapid demand can raise imports and a trade deficit when domestic supply cannot meet expenditure, but export-led growth or import replacement may improve trade instead.