How the RBA thinks about unemployment and inflation
A written lesson from Progressive Money
Before you read
After reading this, you should be able to explain why the RBA expects unemployment to rise when it raises interest rates, and what its framework does not claim.
Why this matters. Every video in this topic argues with this framework, for or against. Knowing what the RBA actually says lets you judge the critics fairly, including the ones you agree with.
Start with a labour market that is running hot. Unemployment is very low, businesses say they cannot find staff, and to hire or keep people they offer bigger pay rises. If pay grows much faster than productivity, businesses pass some of the extra cost on in prices. Households are also spending strongly. Inflation sits well above the RBA's 2 to 3 per cent target.
What the RBA does. The Monetary Policy Board raises the cash rate. Mortgage repayments go up, households have less to spend, and businesses put off investment. As spending slows, businesses need fewer extra workers. Job ads fall, hiring slows, and the unemployment rate drifts up. With less competition for workers, wage growth eases, and so does inflation.
Where the NAIRU comes in. The RBA describes the NAIRU as the lowest unemployment rate that can be sustained without wages growth and inflation rising. If unemployment looks to be below it, the RBA reads the labour market as tight and expects inflation pressure. If unemployment is above it, there is spare capacity and the RBA can cut rates. The NAIRU cannot be observed. A 2017 RBA estimate put it at about 5 per cent, with a band of roughly 4 to 6 per cent; later research put it below 5 per cent before the pandemic. In February 2024 the RBA's models put the unemployment rate consistent with full employment at about 4 to 5½ per cent.
A real example. On 5 September 2023, after a long run of rate rises, the RBA said it expected unemployment to rise gradually to around 4½ per cent by late 2024, while inflation returned to the target range in late 2025.
What the framework says, and what it does not.
- It does not aim for unemployment as a goal. The RBA's mandate is low, stable inflation and full employment, which it describes as maximising employment while keeping inflation low and stable.
- It does accept that unemployment may rise as a side effect of bringing inflation down. Its reasoning is that, over the long term, low and stable inflation supports sustainable employment.
- It holds that interest rates can only move unemployment around the NAIRU in the short run. Lowering the NAIRU itself depends on other government policies, such as skills, training and job matching.
Why critics object. MMT economists such as Bill Mitchell and Pavlina Tcherneva argue that this framework uses unemployed people as the economy's inflation buffer, that NAIRU estimates are too unreliable to steer by, and that a better buffer exists. Mainstream economists reply that the uncertainty is real but the link between a tight labour market and inflation is not imaginary. The rest of this topic weighs those claims.
Three things to remember
- Established The NAIRU cannot be observed, only estimated. A 2017 RBA estimate of about 5 per cent came with a 70 per cent confidence band of plus or minus one percentage point, and estimates have drifted down since, to about 4 to 5½ per cent across the RBA's models in early 2024.
- Official view The RBA's mandate is 2 to 3 per cent inflation and full employment. When it raises rates to cut inflation it expects unemployment to rise somewhat, as in its September 2023 forecast of around 4½ per cent.
- Argument MMT economists such as Bill Mitchell and Pavlina Tcherneva argue the NAIRU framework treats unemployed people as an inflation buffer, and that its estimates are too uncertain to guide policy.
Can you explain it?
Optional. Try as often as you like; nothing is scored or sent anywhere.
Show the answer
It expects slower spending to ease hiring and wage pressure, and accepts unemployment may rise somewhat as inflation falls.
Yes. Higher unemployment is an expected side effect of slowing total spending, not the aim. The RBA's mandate includes full employment alongside low inflation.
Show the answer
Monetary policy should aim for full employment and 2 to 3 per cent inflation.
Yes. This says what policy should aim for. It is written into the RBA's mandate, and choosing it involves value judgements about what matters.
Sources for this lesson
- The Non-Accelerating Inflation Rate of Unemployment (NAIRU), RBA explainer (opens in a new tab)
- The Dual Mandate of Monetary Policy, RBA explainer (opens in a new tab)
- Estimating the NAIRU and the Unemployment Gap, Tom Cusbert, RBA Bulletin (June 2017) (opens in a new tab)
- In Depth: Full Employment, RBA Statement on Monetary Policy (February 2024) (opens in a new tab)
- Statement by Philip Lowe, Governor: Monetary Policy Decision, RBA (5 September 2023) (opens in a new tab)