Real and nominal indicators

The distinction the standard names

• A nominal value is measured in the money of the day — the number written on the payslip, the price tag or the bank statement.
• A real value is that same figure adjusted for inflation — what it is actually worth in terms of goods and services.
• The standard lists "real versus nominal indicators" as an examinable concept, and the exam applies it to wages, interest rates and GDP.

The one relationship you must be able to use

• The approximation used at Level 2 is:

$$\text{real change} \approx \text{nominal change} - \text{inflation rate}$$

• Applied to wages:
  • Nominal wage — the dollar amount you are paid.
  • Real wage — what that pay actually buys.
  • If nominal wages rise 4% while inflation is 6%, real wages have fallen by about 2%. The worker is paid more dollars and is worse off.

Real wages

• Real wages rise only when nominal wage growth exceeds inflation.
• Real wages fall when inflation outruns wage growth — even though the number on the payslip went up.
• This is why "I got a pay rise" and "I am better off" are different claims, and the exam has asked exactly this (2022: a 4.3% nominal rise against 7.3% inflation).

Real interest rates

• Nominal interest rate — the rate the bank advertises.
• Real interest rate — the nominal rate minus inflation; the true reward for saving or true cost of borrowing.

$$\text{real interest rate} \approx \text{nominal interest rate} - \text{inflation rate}$$

• A 6% savings rate with 7% inflation is a real interest rate of about −1%. The saver's balance grows, but it buys less than it did.
• The same arithmetic explains why borrowers gain from unexpected inflation: they repay a fixed number of dollars that are each worth less.

Real GDP

• Nominal GDP rises when either prices rise or output rises — it cannot tell you which.
• Real GDP has inflation stripped out, so it changes only when output changes.
• Only real GDP tells you whether the country actually produced more, which is why economic growth is measured in real terms.

Where the exam uses this

Asked about	The trap
A wage rise below the inflation rate	Saying the worker is better off because the number rose
A savings account during high inflation	Saying savers gain because they earn interest
A rising nominal GDP figure	Calling it economic growth without checking prices