Questions: Inflation: Causes, Types, and Effects

Question 1

In the 1970s, OPEC oil embargoes caused oil prices to spike sharply. This most directly illustrates which type of inflation?

• A. Demand-pull inflation
• B. Cost-push inflation
• C. Hyperinflation
• D. Anticipated inflation

Answer: (B)

Rising oil prices increased production costs across nearly every sector of the economy, shifting the aggregate supply curve left — raising prices while reducing real output. This is the textbook definition of cost-push (supply-shock) inflation. Demand had not increased; rather, supply contracted. The result was stagflation: rising prices combined with falling output, which demand-pull theory cannot explain.

Question 2

Inflation and the price level are the same concept — when economists say 'inflation is 3%', they mean the price level equals 3%.

• T. True
• F. False

Answer: False

Inflation is the rate of change of the price level, not the level itself. If the CPI last year was 200 and this year it is 206, the price level rose by 6 index points and inflation is 3%. The price level is the cumulative measure; inflation is the annual percentage change. Confusing the two is like confusing speed with position — a 3% inflation rate means prices are rising at 3% per year, not that prices are at level 3.

Question 3

Explain why unanticipated inflation tends to redistribute wealth from lenders to borrowers.

Model answer: Loan contracts specify repayment in nominal (dollar) terms. If inflation turns out higher than expected, the real purchasing power of those future dollar payments is lower than the lender anticipated. The borrower repays with dollars that are worth less in real terms, effectively paying back less than was borrowed in real value. Because the nominal interest rate was set before the higher inflation was known, it does not compensate the lender for this loss. Anticipated inflation, by contrast, is priced into nominal interest rates ex ante.

This question targets the mechanism behind the redistribution effect. The key insight is that loan contracts are in nominal terms, and unanticipated inflation erodes real repayment values. This is why the 1970s inflation benefited US homeowners (borrowers with fixed-rate mortgages) at the expense of savings institutions (lenders), and why high inflation is especially damaging to retirees living on fixed nominal incomes.