## Price Prediction

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**Canonical URL:** [Price Prediction](https://www.imf.org/-/media/files/publications/fandd/article/2023/march/back2basics2price-prediction.pdf)

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### What inflation expectations are
- Inflation expectations describe the rate at which people reckon prices will rise or fall in the future.
- Examples from the source:
  - If you think a car costing $20,000 today will cost $22,000 in a year’s time, your inflation expectation for cars is 10 percent.
  - If you expect the car to cost $18,000, your inflation expectation is –10 percent.
  - Your inflation expectation is 0 if you think the price of the car will stay the same.
- Broadening to include all goods and services typically consumed in a country yields an overall inflation expectations number.

### Why expectations matter (mechanisms)
- Consumption timing:
  - Expectation of lower future prices (for example, –10 percent) leads consumers to delay purchases, lowering demand and pushing prices down further.
  - Expectation of higher future prices (for example, 10 percent) leads consumers to accelerate purchases, adding to demand and pushing prices up.
- Wage-price dynamics:
  - If workers and their unions expect prices to increase 10 percent, they will push for pay raises at least as large to protect purchasing power.
  - Firms may raise prices to protect profit margins from higher wage costs, potentially triggering a “wage-price spiral”—inflation that leads to higher wages, leading to even higher inflation.

### Measuring inflation expectations
- Traditional measurement approaches:
  - Surveys conducted by central banks, universities, or private institutions.
  - The University of Michigan conducts a monthly survey in which at least 600 households across the United States are asked to provide their best forecast for inflation.
  - Some surveys collect forecasts from professional analysts at banks or financial firms.
  - Others collate responses from the stores and other businesses that actually set the prices consumers pay.
- Heterogeneity and limits:
  - Professional forecasters are usually the most accurate but still disagree, especially in countries with more volatile prices.
  - Disagreements are even greater among households and firms due to “rational inattention” (most people do not spend much time thinking about inflation if they do not see it as directly relevant).
  - Households may anchor beliefs to frequently purchased items (for example, gasoline), so a simple average of responses does not capture complexity.

### Central bank objectives and tools
- Objective:
  - Most central banks seek to maintain inflation at a stable rate, known as the “target.”
  - Central banks aim to keep inflation expectations “anchored” to the target to achieve price stability.
- Policy horizon:
  - Anchoring near-term inflation expectations is virtually impossible because they largely reflect recent events.
  - Central banks focus on managing inflation expectations over the medium term, typically two- to three-yearsover which they have tools to influence inflation.
- Monetary policy tools:
  - If inflation is above the target, the central bank can raise its short-term policy interest rate and influence longer-term interest rates to make borrowing more expensive, dampen demand, and lower inflation expectations.
  - Communication (“forward guidance”) signals about the future direction of monetary policy to influence expectations. Forward guidance became widespread when interest rates of many central banks were stuck at or close to zero for the decade or so after the 2008–09 financial crisis.
  - Even when policy rates were negative, central banks refined communication of future policy to stimulate demand and push inflation expectations back up to target.

### Central bank credibility and trade-offs
- Credibility costs and scenarios:
  - If inflation expectations are higher than the target and the central bank lowers interest rates instead of raising them, credit becomes cheaper, demand booms, and prices move further away from the target. People would conclude the central bank is not serious about price stability, keeping expectations above the target and extending higher inflation.
  - For a credible central bank committed to price stability, people believe the central bank will restore price stability, so expectations may not change over the two- to three-year policy horizon even if inflation temporarily deviates from the target.
- Building and maintaining credibility:
  - Achieving credibility takes time and consistent action in line with the mandate of price stability.
  - This can require difficult trade-offs, such as raising interest rates to dampen price pressures—even when the economy is weak and unemployment is rising.
  - Once inflation expectations are anchored securely, the central bank can be much less aggressive and still achieve price stability; overshooting or undershooting will tend to correct itself faster, enabling focus on secondary objectives such as stimulating economic growth and employment.

### Key observations and implications
- Today’s inflation expectations are likely to become tomorrow’s actual inflation.
- The inflation figures reported monthly are important, but inflation expectations are often more important for an economy’s outlook and the future direction of interest rates.

*FRANCESCO GRIGOLI is a senior economist in the IMF’s Research Department.*

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_Source: https://www.imf.org/-/media/files/publications/fandd/article/2023/march/back2basics2price-prediction.pdf_