Production Possibility Frontier

A production possibility frontier shows how much an economy can produce given existing resources.

A production possibility can show the different choices that an economy faces.

For example, when an economy produces on the PPF curve, increasing the output of goods will have an opportunity cost of fewer services.

Diagram of Production Possibility Frontier

pareto-efficiency

  • Moving from Point A to B will lead to an increase in services (21-27). But, the opportunity cost is that output of goods falls from 22 to 18.
  • At point D, the economy is inefficient. At point D, we can increase both goods and services without any opportunity cost.
  • Pareto efficiency is any point on the PPF curve. On the PPF curve, it is impossible to increase one choice, without causing less production of the other.

Economic Growth

If there is an increase in land, labour or capital or an increase in the productivity of these factors, then the PPF curve can shift outwards enabling a better trade-off.

ppf-economic-growthGraph showing increase in PPF.

Note: there is a link between macroeconomics and the long-run aggregate supply curve. If the PPF curve shifts to the right, then it is similar effect to the LRAS shifting to the right

supply-side-policies

Production possibility frontier and investment

One choice an economy faces is between capital goods (investment) and consumer goods.

  • If more resources are devoted to capital goods (e.g. building new factories) then in the short-term, consumption will go down.
  • However, if the investment is successful, then in the long-run, productive capacity will increase and the PPF curve will shift to the right

ppf-consumer-capital-goods

Increase in capital goods has an opportunity cost of fewer consumer goods, but in long-term can enable economic growth.

Similarly, a decline in investment can enable more consumer goods in the short-term but can lead to lower rates of economic growth.

PPF and choices for government

Any government faces a trade-off in how to use scarce resources and tax revenue. If the government increases spending on the military, then the opportunity cost will be less spending on another public service, such as health care.

Different PPF Curves

ppf-straight

This shows a trade-off between working and hours spent in leisure.

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