Economics
The Interplay Between Inflation and Purchasing Power in Economies
Quick fact
In 1950, a US dollar could buy about 10 gallons of gasoline; by 2020, it could buy less than 1 gallon. That’s inflation eating away at purchasing power.
Why this is interesting
You’ve probably noticed that a dollar doesn’t buy as much as it used to. But what exactly is happening to your money?
Read the full explanation
Understanding The Interplay Between Inflation and Purchasing Power in Economies
Think of money as a voucher for goods. When prices rise, each voucher gets you less. Inflation is the general increase in prices, and purchasing power is how much stuff your money can actually buy. To see it, imagine your weekly allowance is $10. Last year, you could buy 10 ice cream cones at $1 each. This year, the price is $1.10, so you can only buy 9 cones. Your nominal money is the same, but its purchasing power fell. Economists track inflation by watching the prices of a typical basket of goods, like food, housing, and transportation. When that basket gets more expensive, your money’s value shrinks.
A deeper explanation
The underlying mechanism is that inflation reduces the real value of money over time. Because money is just a medium of exchange, its worth is determined by what it can buy. When the general price level rises, each unit of currency can purchase fewer goods and services. This is why economists distinguish between nominal values: the stated amount, and real values: adjusted for inflation. If your salary goes up but prices rise faster, your real income actually falls. Similarly, if you keep cash under your mattress, inflation quietly taxes it. That’s why saving money in a bank that pays interest is often better, and why investors seek assets that grow faster than inflation. Understanding this interplay helps you see why central banks (like the US Federal Reserve) aim for a moderate inflation rate, usually around 2%, to encourage spending and investment while preserving long-term purchasing power.