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Economics & Markets

Inflation

Model #0697Category: Economics & MarketsDepth to apply:

By Updated 3 sources

4 min read

Contents

  1. 1. Core Idea
  2. 2. How to See It
  3. 3. How to Use It
  4. 4. Founders & Leaders
  5. 5. Connected Models
  6. 6. One Key Quote
  7. 7. Summary & Further Reading
Economics & Markets
Section 1

Core Idea

Inflation is a sustained rise in the general level of prices — the value of money in terms of goods falls. It's usually measured by a price index (e.g. CPI, PCE) over a period. Causes include demand pull (too much spending vs capacity), cost push (e.g. energy, wages), or monetary expansion. For founders, inflation affects real wages, input costs, and the real value of debt and cash; it also shifts discount rates and valuation. High inflation erodes nominal contracts and makes long-term planning harder; low and stable inflation is the usual baseline. Separate nominal (stated) from real (inflation-adjusted) when judging returns and costs.

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Section 2

How to See It

Pricing
You're seeing Inflation when you raise prices not because value changed but because costs or the general price level rose. Pass-through and margin depend on elasticity and competition; inflation is the backdrop.
Finance
You're seeing it when discount rates and cost of capital include an inflation premium. Real rates = nominal minus expected inflation. Valuations and project NPVs should use consistent real vs nominal assumptions.
Hiring
You're seeing it when wage expectations track inflation. In high-inflation periods, nominal wage growth rises; real wages may or may not. Budget and comp planning need an inflation assumption.
Section 3

How to Use It

Assume an inflation path for planning (e.g. 2% or current consensus). Do valuation and capital allocation in real terms when possible, or be explicit about nominal. Lock in nominal cost (e.g. fixed-rate debt) when you expect inflation to rise; avoid long nominal receivables when inflation is high. Index key contracts if the horizon is long.
Decision filter
"Are we thinking in nominal or real terms? For multi-year decisions, real (inflation-adjusted) numbers are the right basis. For contracts and comp, decide whether to index."
As a founder
Build an inflation assumption into budgets and board decks. When raising or deploying capital, clarify whether your hurdle is nominal or real. In high-inflation environments, favour shorter nominal commitments and pass-through where possible.
Section 5

Founders & Leaders

Indra NooyiFormer CEO, PepsiCo; Chair, Amazon
Nooyi managed input costs and pricing across cycles, including inflationary periods — passing through where possible, hedging and reformulation where not. Founders can copy the discipline: model inflation in the P&L and balance sheet, and separate "we're raising price because of inflation" from "we're raising price because of value."
Section 7

Connected Models

Reinforces
GDP
Real GDP is nominal GDP adjusted for inflation. Growth and business planning should use real figures for volume and productivity; inflation is the wedge between nominal and real.
Reinforces
Time Value of Money
The time value of money includes an inflation component: nominal rates = real rate + expected inflation (approx.). Discounting and NPV depend on whether you use nominal or real cash flows and rates.
Leads-to
Cost of Capital
Cost of capital is usually quoted in nominal terms; it embeds expected inflation. For real project evaluation, use real cost of capital and real cash flows so inflation doesn't double-count.
Section 8

One Key Quote

"Inflation is always and everywhere a monetary phenomenon. But in the short run, supply and demand for goods and labour drive the pace of price change."
— Milton Friedman, on inflation
Section 11

Summary & Further Reading

Inflation: sustained rise in the price level. Use real (inflation-adjusted) figures for strategy and valuation; assume an inflation path for comp and contracts. In high-inflation regimes, shorten nominal commitments and pass through where possible.
01
Principles of Economics — N. Gregory Mankiw
Book
Inflation, money, and real vs nominal in standard macro.
02
The Great Inflation — Robert Samuelson (2008)
Book
History and lessons of inflation cycles.
03
Central bank communications (Fed, ECB)
Online
Inflation targets, forecasts, and policy; inputs for your own assumptions.

Why this matters next

mental modelsSupply and Demand

Inflation applied the Supply and Demand mental model

mental modelsInflation

Inflation applied the Inflation mental model

mental modelsEnvironment

Inflation applied the Environment mental model

mental modelsPrice Discrimination

Inflation applied the Price Discrimination mental model

mental modelsCost of Capital

Inflation applied the Cost of Capital mental model

mental modelsCost

Inflation applied the Cost mental model

Frequently asked questions

What is Inflation?

Inflation is a mental model used for better thinking and decision-making.

How do you apply Inflation?

To apply Inflation, identify situations where this framework is relevant, then use it as a lens to evaluate your options and decisions. The model is most useful when combined with other complementary mental models.

What category does Inflation fall under?

Inflation falls under the Economics & Markets category of mental models. Other models in this category can be found on the Economics & Markets hub page.

Why is Inflation important?

Inflation is important because it provides a structured way to think about problems that would otherwise be approached with intuition alone. Understanding this model helps you avoid common reasoning errors and make better decisions.

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