Grade 11 Economics: Chapter 3- Lesson 3.5

What is the core economic distinction between Nominal GDP and Real GDP?

Nominal GDP: Measures total economic output using current prevailing market prices, meaning it can rise purely due to inflation.

Real GDP: Measures total economic output adjusted for inflation by using constant prices from a designated base year.

Why must economists adjust Nominal GDP to find Real GDP when tracking long-run economic growth?

Because a country's nominal output might rise significantly from one year to the next simply because prices rose (inflation), without any actual increase in the physical quantity of goods produced.

What is the definition of the GDP Deflator?

It is a price index that measures the average level of prices for all new, domestically produced final goods and services in an economy.

What is the mathematical formula used to calculate the GDP Deflator?

$$\text{GDP Deflator} = \left( \frac{\text{Nominal GDP}}{\text{Real GDP}} \right) \times 100$$

How can you calculate Real GDP if you are only given Nominal GDP and the GDP Deflator?

$$\text{Real GDP} = \left( \frac{\text{Nominal GDP}}{\text{GDP Deflator}} \right) \times 100$$

What is the definition of the Consumer Price Index (CPI)?

It is a macroeconomic measure that tracks changes over time in the average prices paid by urban consumers for a fixed market basket of consumer goods and services.

What is the mathematical formula used to calculate the Consumer Price Index (CPI) for a specific year?

$$\text{CPI} = \left( \frac{\text{Cost of Market Basket in Current Year}}{\text{Cost of Market Basket in Base Year}} \right) \times 100$$

What is a base year in price indices, and what value is it always assigned?

A benchmark year used as a point of reference for comparison with other years. Its index value (for both CPI and GDP Deflator) is always exactly 100.

What is the core difference in coverage between the GDP Deflator and the CPI?

GDP Deflator: Reflects the prices of all domestically produced goods and services (including capital goods and government purchases).

CPI: Reflects only the prices of goods and services typically bought by final consumers (including imported consumer items).

How do the market baskets change over time between the CPI and the GDP Deflator?

CPI: Uses a fixed basket of goods that rarely changes.

GDP Deflator: Uses a changing basket consisting of whatever mix of goods the economy currently produces in that specific year.

What is the general economic definition of Inflation?

A sustained, general increase in the overall price level over time, which reduces the purchasing power of money.

What is the mathematical formula used to calculate the Inflation Rate using CPI?

$$\text{Inflation Rate} = \left( \frac{\text{CPI}_{\text{Year 2}} - \text{CPI}_{\text{Year 1}}}{\text{CPI}_{\text{Year 1}}} \right) \times 100\%$$

If a country's CPI rises from 120 in Year 1 to 132 in Year 2, what is the exact annual inflation rate?

10%

$$\text{Calculation: } \left( \frac{132 - 120}{120} \right) \times 100 = \left( \frac{12}{120} \right) \times 100 = 0.10 \times 100 = 10\%$$

If a country's Nominal GDP equals Real GDP in a given year, what does this tell you about that year?

It means that the current year is the base year, resulting in a GDP Deflator of exactly 100.