When economists announce that inflation has cooled to acceptable levels, millions of people pushing shopping carts through supermarket aisles respond with a single, unified thought: are you joking?
The disconnect is not imaginary, nor is it merely psychological. It reflects a genuine measurement problem that sits at the heart of how modern economies understand themselves. The Consumer Price Index—that totemic number that guides central bank policy, wage negotiations, and retirement adjustments—measures something real. It simply does not measure what most people think it measures, and the difference matters enormously.
What the index actually tracks
Price indices are weighted averages, and the weights reflect spending patterns across an entire economy. Housing costs dominate most indices, followed by transportation, food, and healthcare in varying proportions. The statistical agencies that compile these figures do sophisticated work: they adjust for quality improvements, substitute goods when prices spike, and smooth seasonal variations. The result is a number that accurately captures aggregate price movements across a representative basket of goods and services.
The trouble is that no household is average. A retiree on a fixed income experiences a radically different inflation rate than a young professional whose largest expense is rent. A family with three children feels food price increases with brutal intensity; a single urban dweller barely notices. The index assumes substitution—if beef prices rise, consumers switch to chicken—but many households do not experience their budgets as fungible. They buy what they buy.
The frequency illusion
Beyond composition, there is timing. Humans notice prices they encounter repeatedly. Gasoline prices, displayed in giant illuminated numerals on every major road, burn themselves into memory. Grocery prices, confronted weekly, accumulate into a felt sense of economic pressure. Meanwhile, the television that costs half what it did a decade ago sits quietly in the living room, its deflation invisible.
Economists call this salience bias, and it is not irrational. The items that dominate conscious experience are precisely the items that strain monthly budgets. A cheaper smartphone does not offset more expensive eggs when the eggs must be purchased every week and the phone every few years. The index weights these correctly by expenditure share, but expenditure share is not the same as psychological weight.
The base-rate problem
There is also the matter of cumulative drift. When inflation runs at three percent annually for several years, the index dutifully reports three percent each year. But households do not reset their mental baselines annually. They remember what bread cost five years ago, and they notice that it now costs meaningfully more. The index measures rates of change; humans experience levels. Both are valid perspectives, but they produce very different emotional responses to the same underlying reality.
Our take
None of this means price indices are useless or that statisticians are deceiving the public. The CPI does what it is designed to do: provide a consistent, comparable measure of aggregate price movements over time. The problem is that policymakers and commentators often treat it as a measure of lived economic experience, which it was never meant to be. When central bankers declare victory over inflation while voters seethe at checkout counters, both are telling the truth. They are simply describing different things. A more honest public conversation would acknowledge that the number and the feeling can diverge—and that the feeling is not wrong.
