## Global Inflationary Episode Offers Lessons for Monetary Policy

_IMF Blog, October 16, 2024_

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**Canonical URL:** [Global Inflationary Episode Offers Lessons for Monetary Policy](https://www.imf.org/en/blogs/articles/2024/10/16/global-inflationary-episode-offers-lessons-for-monetary-policy)

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## Bibliographic details
- Authors: Jorge-Alvarez, Alberto Musso, Jean-Marc-Natal, Sebastian Wende
- Published: October 16, 2024

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### Overview and context
- Title authors: Jorge Alvarez, Alberto Musso, Jean-Marc Natal, Sebastian Wende.
- Publication date: October 16, 2024.
- The inflation surge occurred over the "past three years" and pushed global inflation to its highest level "since the 1970s".
- The analysis summarizes Chapter 2 of the October 2024 World Economic Outlook, “The Great Tightening: Insights from The Recent Inflation Episode.”
- Additional contributors: Emine Boz, Thomas Kroen, Galip Kemal Ozhan, Nicholas Sander, Sihwan Yang.

### Causes of the inflation surge
- Pandemic lockdowns shifted demand away from services and toward goods.
- Unprecedented fiscal and monetary stimulus boosted aggregate demand.
- Production capacity could not be ramped up quickly enough in many firms, producing sector-specific mismatches between supply and demand.
- Logistics pressures: ports were stretched to or beyond capacity, partly due to pandemic-related staffing shortages, producing backorders as demand for goods surged.
- When economies reopened, services demand rebounded strongly.
- Russia’s invasion of Ukraine sent commodity prices soaring, contributing to elevated global inflation.

### Modeling findings and dynamics
- The chapter models how inflation spikes in specific sectors became embedded in core inflation (the measure that excludes food and energy).
- Key mechanism: interaction between soaring demand and sector-specific bottlenecks and shocks produced large shifts in relative prices and an unusual dispersion of prices.
- When supply bottlenecks were widespread and coincided with strong demand:
  - The Phillips curve steepened and shifted upwards.
  - A steeper Phillips curve implied that relatively small changes in economic slack could have a large effect on inflation.

### Implications of a steeper Phillips curve
- Negative outcome: inflation surged as many sectors hit capacity constraints.
- Positive outcome: it was possible to curb inflation at a lower cost in terms of lost economic output.
- New lesson: widespread supply bottlenecks can create a favorable tradeoff for central banks confronting a demand surge—policy tightening can more effectively and rapidly lower inflation with limited output costs.
- Old lesson re-affirmed: when bottlenecks are confined to specific sectors with relatively flexible prices (for example, commodities), focusing monetary policy on core inflation measures remains appropriate; excessive tightening in those cases can be counterproductive, causing costly economic contraction and resource misallocation.

### Policy recommendations and framework implications
- Monetary policy frameworks should identify conditions under which front-loaded tightening is appropriate.
- Recommendations to enhance readiness and decision-making:
  - Develop enhanced models and better sectoral data to gauge underlying inflationary forces and improve forecasts.
  - Collect more frequent data for prices by sector and for supply constraints to detect whether key sectors are hitting supply bottlenecks.
  - Deepen understanding of structural factors, including how different sectors set prices and the linkages between sectors.
  - Incorporate well-defined "escape clauses" in policy frameworks to tackle inflationary pressures when aggregate Phillips curves steepen.
  - Ensure forward guidance internalizes those escape clauses and allows for front-loading of tightening when warranted.
- Expected benefit: added flexibility should help central banks be better prepared in the future and safeguard credibility.

_This blog is based on Chapter 2 of the October 2024 World Economic Outlook, “The Great Tightening: Insights from The Recent Inflation Episode.”_

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## References

- [World Economic Outlook](https://www.imf.org/en/Publications/WEO/Issues/2024/10/22/world-economic-outlook-october-2024?cid=bl-com-AM2024-WEOEA2024002)

_Source: https://www.imf.org/en/blogs/articles/2024/10/16/global-inflationary-episode-offers-lessons-for-monetary-policy_