Real GDP reflects output more accurately than nominal GDP by using constant prices.
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hy do economists use resl GDP rather than nominal GDP to gauge economic well-being?
Real GDP calculations have been adjusted to factor in inflation. Nominal GDP calculations are not adjusted. It is harder to make valid comparisons across time if you don't adjust for price level differences.
Economists use real GDP per capita rather than simply real GDP. This is because population growth is an important variable (per capita), and so, real GDP per capita is the more accurate measurement of the GDP.
No, nominal interest can never be a negative rate. If such an event occurred it would involve customers paying the banking, at which point it would be referred to as a fee rather than interest.
The GDP deflator is calculated by dividing nominal GDP by real GDP and multiplying by 100. It indicates the overall price level in an economy by measuring the change in prices of all goods and services produced, showing how much of the change in GDP is due to price increases rather than actual growth.