Glossary term
Phillips Curve
The Phillips Curve is an economic idea describing a relationship between unemployment and inflation or wage growth.
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What Is the Phillips Curve?
The Phillips Curve is an economic idea describing a relationship between unemployment and inflation or wage growth. In its simplest form, it suggests that low unemployment can be associated with faster wage or price inflation, while high unemployment can be associated with weaker inflation pressure.
The relationship is not a mechanical law. It has changed across time and can be affected by inflation expectations, productivity, supply shocks, policy choices, globalization, labor-market structure, and credibility of central banks.
Key Takeaways
- The Phillips Curve links labor-market tightness with inflation or wage growth.
- It is often discussed when central banks weigh inflation and employment conditions.
- The relationship can weaken, shift, or break down in different economic periods.
- It is a framework for analysis, not a reliable short-term forecast by itself.
Labor Markets and Inflation Pressure
When unemployment is low, employers may need to raise wages to attract and retain workers. Higher wages can support consumer spending, but they can also raise business costs. If firms pass those costs to customers, inflation may rise.
When unemployment is high, wage pressure may soften because workers have less bargaining power and businesses face weaker demand. That can reduce inflation pressure, though it does not guarantee low inflation if other forces are pushing prices up.
Economic Condition | Possible Phillips Curve Interpretation |
|---|---|
Low unemployment | Labor market may create upward wage and inflation pressure. |
High unemployment | Weak labor market may reduce wage and demand pressure. |
Supply shock | Prices can rise even if unemployment is not low. |
Anchored expectations | Inflation may respond less to short-run labor-market changes. |
Where Investors and Households See It
The Phillips Curve shows up in Federal Reserve commentary, inflation debates, bond-market expectations, wage discussions, and economic forecasts. It helps explain why strong job growth can sometimes make markets worry about higher interest rates.
For households, the link is indirect but real. Inflation, wages, unemployment, and interest rates affect job security, borrowing costs, savings yields, purchasing power, and investment returns.
What Has Changed
The Phillips Curve has been flatter or less stable in some periods. That means unemployment can fall without inflation rising as much as older models might have predicted. In other periods, supply shocks can push inflation higher even when unemployment is not unusually low.
The modern use of the Phillips Curve is more cautious. Economists often treat it as one input among many, not a complete inflation model.
The Bottom Line
The Phillips Curve is a framework for thinking about unemployment, wages, and inflation. It remains useful, but only when read with expectations, supply conditions, monetary policy, and the broader economy.