Growth, unemployment and inflation (SACE Stage 2 Economics)
“Define and measure economic growth, unemployment and inflation and explain their causes and effects.”
Economic growth is measured by the change in real GDP, unemployment by the percentage of the labour force without work but seeking it, and inflation by the percentage rise in the Consumer Price Index. Together they are the main indicators of an economy's health and the targets of macroeconomic policy.
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What this dot point is asking
You need to define and explain how to measure economic growth, unemployment and inflation, identify their causes, and assess their costs and benefits.
Economic growth
Economic growth is an increase in the real value of goods and services produced by an economy, measured by the change in real Gross Domestic Product (GDP). Real GDP is adjusted for inflation, so it captures genuine increases in output rather than higher prices.
Growth is driven by increases in AD (in the short run) and in productive capacity through more or better resources (in the long run). Benefits include higher incomes and living standards and lower unemployment; costs can include environmental damage, resource depletion and inflationary pressure if growth is too rapid.
GDP is the total market value of all final goods and services produced within a country over a period of time. Real GDP adjusts this figure for changes in prices so that growth reflects changes in actual output.
Unemployment
Unemployment refers to people who are willing and able to work and are actively seeking work but cannot find a job. The unemployment rate is:
In Australia these figures come from the Australian Bureau of Statistics monthly Labour Force Survey. The labour force is the employed plus the unemployed; people not seeking work are outside the labour force.
Main types of unemployment:
- Cyclical - caused by a downturn in the business cycle and a fall in AD.
- Structural - a mismatch between workers' skills or location and available jobs.
- Frictional - people between jobs.
- Seasonal - work that varies with the time of year.
High unemployment has economic costs (lost output, lower incomes, higher welfare spending and reduced tax revenue) and social costs (lower wellbeing, skill erosion and inequality). This is why low unemployment is a core policy objective, even though some frictional and structural unemployment always remains.
Inflation
Inflation is a sustained increase in the general price level, measured in Australia by the Consumer Price Index (CPI), which tracks the price of a representative basket of goods and services.
Causes of inflation:
- Demand-pull inflation - excessive AD pulls prices up when the economy is near capacity.
- Cost-push inflation - rising production costs (wages, energy, imports) push prices up, shifting SRAS to the left.
Costs of inflation include reduced purchasing power, uncertainty for business, a loss of international competitiveness, and the erosion of savings. Deflation (falling prices) and very high inflation are both harmful, which is why the Reserve Bank of Australia targets inflation of 2 to 3 percent on average over time.
If your wage rises 4 percent over a year but the inflation rate is 5 percent, your nominal wage is higher but your real wage has fallen by about 1 percent, so you can buy less than before. Always distinguish nominal values (in current dollars) from real values (adjusted for inflation) when judging living standards.
Why this matters
These three indicators, together with the standard of living and external balance, are the objectives that fiscal and monetary policy try to achieve. The business cycle links them: a boom tends to lower unemployment but raise inflation, while a recession does the opposite. Understanding the trade-offs between them is essential for evaluating policy in the next two dot points.
Inflation is the rate at which prices are rising, not the level of prices. Prices can be high but inflation low if they are barely changing, and falling inflation (disinflation) still means prices are rising, just more slowly. Only deflation means prices are actually falling.
Exam-style questions
Questions in the style of SACE Board exam questions on this dot point, each with a worked answer. They are written by ExamExplained unless tagged "Past paper"; the year shows the paper a question is modelled on.
2020 SACE Stage 2-style3 marks(i) Define the macroeconomic objective of 'full employment of labour'. (1 mark) (ii) Explain why there would be some unemployment if the macroeconomic objective of full employment has been achieved. (2 marks)Show worked answer →
Three marks total.
(i) Definition (1 mark). Full employment of labour is the situation where the economy is using all the labour resources it can without generating accelerating inflation. It corresponds to the natural rate of unemployment, where only frictional and structural unemployment remain and cyclical unemployment is zero.
(ii) Why some unemployment remains (2 marks). Even at full employment there is frictional unemployment (people between jobs or searching for a first job, which takes time) and structural unemployment (a mismatch between workers' skills or location and the jobs available). Because these always exist in a dynamic economy, full employment does not mean zero unemployment; it means cyclical (demand-deficient) unemployment has been eliminated, leaving the natural rate.
2023 SACE Stage 2-style2 marksCountry X's price stability objective is to maintain an inflation rate of between 2-3% over the course of the business cycle. Explain one possible reason why Country X's inflation target is not 0%.Show worked answer →
Two marks: state a reason and explain it.
One reason is that a small, positive inflation rate provides a buffer against deflation. Aiming for 0% risks tipping the economy into deflation if conditions weaken, and deflation is damaging because falling prices encourage households to delay spending, depress economic activity and raise the real burden of debt.
(Other accepted reasons, each explained: low positive inflation allows real wages to adjust without nominal wage cuts, giving the labour market flexibility; and CPI tends to slightly overstate true inflation, so a target above 0% accounts for measurement bias.) A complete 2-mark answer names the reason and explains why it justifies a positive target band.
2019 SACE Stage 2-style1 markDefine what is meant by the term 'labour force participation rate'.Show worked answer →
One mark for an accurate definition.
The labour force participation rate is the percentage of the working-age population (typically those aged 15 and over) who are in the labour force, that is who are either employed or actively seeking and available for work (unemployed).
It is calculated as the labour force divided by the working-age population, expressed as a percentage. People who are not working and not actively looking for work (for example full-time students, retirees or discouraged workers) are outside the labour force and are excluded.
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Sources & how we know this
- Stage 2 Economics subject outline (2025 onwards) — SACE Board
- Stage 2 Economics: external assessment — SACE Board