Market economic system

Economics · The allocation of resources. The idea in plain words, the rules to remember, the mistake to avoid and a worked example, written and checked by Mega Lecture.

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The idea

A market economic system is one in which resources are allocated mainly by the price mechanism, through the decisions of buyers and sellers. Resources are privately owned. Firms aim for profit and consumers are free to choose what to buy. The government has only a small role, such as protecting property rights and keeping law and order.

Consumer spending decides what is made. If demand for a product rises, its price and profit rise, so firms move resources into making it.

The system gives choice, competition and incentives to work hard, cut costs and innovate. Its weakness is market failure: some goods are not provided at all, some are under-consumed or over-consumed, and harm to third parties is ignored.

Rules to remember

Market economic system: resources are allocated by the price mechanism, with private ownership and little government intervention
Advantages: wide consumer choice, competition keeps prices low and quality high, the profit motive encourages efficiency and innovation, quick response to changes in demand
Public goods (street lighting, defence) are not provided, because firms cannot make non-payers pay
Merit goods (education, health care) are under-consumed; demerit goods (cigarettes) are over-consumed
External costs such as pollution are ignored by firms
Incomes can be very unequal, and those who cannot work may have little or no income
Firms may grow into monopolies and raise prices

Common mistake

Students write that a market economy produces what people need. It produces what people are willing and able to pay for, so the wants of people with little income may not be met.

Worked example

In a market economy many families need low-cost housing, but builders mostly put up expensive villas. Why does the market system give this result?

In a market system, firms decide what to make by looking at price and profit.
Rich buyers can pay high prices, so villas are the more profitable use of land and labour.
Poor families have the need but not the ability to pay, so their need is not demand in the market.

Answer: Resources follow spending power, not need, so the market supplies villas and too few low-cost homes.

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