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IB Economics · Microeconomics · Topic 2.12

The Market's Inability to Achieve Equity

Clear, syllabus-mapped IB Economics revision notes on the market's inability to achieve equity — explanations, worked examples and exam technique, then a free targeted practice drill.

IB EconomicsSL & HLFree revision notes

Syllabus points

Equity versus equality

Equity means fairness in the distribution of income and opportunity; equality means everyone having the same. They are not the same — most economists argue for *equity* (a fair distribution) rather than strict equality, because some inequality can reward effort and risk-taking.

A free market allocates income according to the ownership of resources and their market value. This can leave some people with very little — the market has no mechanism to guarantee a fair outcome, only an efficient one. So even a well-functioning market can produce an inequitable distribution, which many regard as a market failure in the wider sense.

Key definitions

TermExam-ready definition
EquityFairness in the distribution of income and opportunity.
EqualityEveryone receiving the same, regardless of circumstances.
Progressive taxA tax taking a larger percentage of income as income rises.
Transfer paymentGovernment payments (e.g. benefits) that redistribute income.

Why markets may be inequitable

Government responses

Each involves trade-offs: high taxes and generous benefits may weaken work incentives, while too little support entrenches poverty. The equity–efficiency trade-off is a central evaluation theme.

Worked example

A government introduces a more progressive income tax and uses the revenue to fund free schooling in poorer areas. This narrows income inequality and widens opportunity. However, very high top tax rates might discourage effort or encourage avoidance, so the government must balance fairness against efficiency and incentives.

Common exam mistakes

Exam technique

Define equity precisely, explain *why* the market alone will not deliver it, then evaluate redistribution policies using the equity–efficiency trade-off and their effect on incentives.

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