Changes

This formula differs from the [[CPI]] calculation in that current year quantities are used. The value of the GDP Deflator can be substituted for CPI values in the formulas for inflation and real GDP. Since the GDP Deflator reflects both price changes and substitutions away from goods that have become relatively expensive, it generally registers a lower inflation rate than the CPI.

This formula differs from the [[CPI]] calculation in that current year quantities are used. The value of the GDP Deflator can be substituted for CPI values in the formulas for inflation and real GDP. Since the GDP Deflator reflects both price changes and substitutions away from goods that have become relatively expensive, it generally registers a lower inflation rate than the CPI.