What Is the Non-Accelerating Inflation Rate of Unemployment (NAIRU)?

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What Is the Non-Accelerating Inflation Rate of Unemployment (NAIRU)?

Let me explain NAIRU directly: it's the specific unemployment level in an economy that doesn't push inflation higher. If unemployment hits this NAIRU point, inflation stays constant. You can think of it as the balance between the overall economy and the labor market.

Key Takeaways

NAIRU marks the lowest unemployment level before inflation starts creeping up. When unemployment is at NAIRU, inflation holds steady; if it rises above, inflation drops; if it falls below, inflation climbs. The Federal Reserve has used models to peg NAIRU at 5% to 6% historically, and more recently at 4% to 5%. Evaluating NAIRU helps the Fed pursue maximum employment and price stability. On the flip side, NAIRU ignores other inflation drivers beyond unemployment, and the link between inflation and unemployment can sometimes fail, making NAIRU less reliable.

How NAIRU Works

There's no fixed formula for NAIRU, but the Federal Reserve has relied on statistical models, estimating it at 5% to 6% in the past and trending lower to 4% to 5% from 2005 to 2030 according to the St. Louis Fed. NAIRU fits into the Fed's goals of maximum employment and price stability. For instance, the Fed aims for 2% inflation over the medium term. If a strong economy pushes prices up too fast, threatening to exceed that target, the Fed tightens policy to cool things down and curb inflation.

Understanding NAIRU

As unemployment rises, inflation typically falls. In a weak economy, businesses can't hike prices due to low demand, so if demand drops for a product, its price decreases to spark interest. NAIRU is the unemployment level the economy must reach before prices start declining. On the other hand, if unemployment dips below NAIRU in a thriving economy, inflation rises as companies match prices to demand, especially for items like housing and cars. NAIRU is essentially the floor for unemployment before inflation kicks in. Consider it the tipping point where unemployment influences whether prices rise or fall.

How NAIRU Came About

In 1958, economist A.W. Phillips published a paper showing an inverse link between unemployment and wage inflation in the UK from 1861 to 1957, which became known as the Phillips curve. But during the 1974-1975 recession, high inflation coincided with high unemployment, challenging this idea. Critics like Milton Friedman argued that targeting low unemployment shifted inflation expectations, leading to faster inflation instead of lower joblessness. It was decided that policies shouldn't aim below a 'natural' unemployment rate. NAIRU emerged in 1975 as the noninflationary rate of unemployment by Franco Modigliani and Lucas Papademos, building on Friedman's natural rate concept.

The Correlation Between Unemployment and Inflation

Imagine unemployment at 5% and inflation at 2%; if these hold, dropping below 5% unemployment would likely pair with inflation over 2%. Critics note this static rate won't persist due to factors like disasters or instability shifting the balance. The theory holds that if unemployment stays below NAIRU for years, inflation expectations rise, pushing inflation up. If above NAIRU, expectations fall, and inflation decreases. When they match, inflation stays put.

NAIRU vs. Natural Unemployment

Natural unemployment is the minimum rate from real economic forces, like tech replacing jobs or skill mismatches. 'Full employment' is misleading because there are always job seekers, such as graduates or those displaced by tech— this labor movement is natural unemployment. NAIRU focuses on how unemployment relates to inflation, specifically the level where inflation doesn't rise.

Limitations of Using NAIRU

NAIRU examines the historical tie between unemployment and inflation, pinpointing where prices might shift. But in practice, this correlation can break. Many factors beyond inflation affect unemployment, like skill gaps leading to joblessness. Estimating NAIRU is tricky—you can't fully verify its accuracy. There's also criticism about the social costs of basing policy on it.

Why Can Low Unemployment Be Bad for the Economy?

If unemployment falls below NAIRU, increased demand can drive inflation above the Fed's 2% target. In the 21st century, the Fed has often set NAIRU at 4% to 5%.

What Is Natural Unemployment?

No economy reaches 100% employment because structural issues always leave some unemployed, like job losses to technology or skill mismatches, plus new entrants like graduates.

What Is the Phillips Curve?

It's the inverse relationship between unemployment and inflation first outlined by A.W. Phillips in 1958.

The Bottom Line

In reality, the link between inflation, falling prices, and unemployment can falter, but historically it often holds. That equilibrium point is NAIRU. Note: This corrects that dropping below NAIRU creates demand upticks potentially raising inflation faster than the Fed's 2% ideal.

What Is the Non-Accelerating Inflation Rate of Unemployment (NAIRU)?

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