1. Measuring a Nation’s Income10
Measuring a Nation’s Income

2. The Economy’s Income and Expenditure
Gross Domestic Product (GDP)
Measures the total income of everyone in the economy
Measures the total expenditure on the economy’s output of goods and services
For an economy as a whole
Income must equal expenditure
Circular-flow diagram – assumptions:
All goods and services – bought by households
Households - -spend all of their income

3. Measurement of Gross Domestic Product
Gross domestic product (GDP)
Market value of all final goods and services
Produced within a country
In a given period of time
“GDP is the market value…”
Market prices - reflect the value of the goods

4. Measurement of Gross Domestic Product
“… of all…”
All items produced in the economy
And sold legally in markets
Excludes items that are:
Produced and sold illicitly, or
Produced and consumed at home
“… final…”
Value of intermediate goods is already included in the prices of the final goods

5. Measurement of Gross Domestic Product
“… within a country…”
Goods and services produced domestically, regardless of the nationality of the producer
“… in a given period of time”
A year or a quarter

6. The Components of GDP Y = C + I + G + NX Identity Y = GDP
C = consumption
I = investment
G = government purchases
NX = net exports

7. The Components of GDP Consumption Investment Spending by households
On goods and services
Exception: purchases of new housing
Investment
Spending on capital equipment, inventories, and structures
Including household purchases of new housing
Inventory accumulation

8. The Components of GDP Government purchases
Government consumption expenditure and gross investment
Spending on goods and services
By local, state, and federal governments
Does not include transfer payments

9. The Components of GDP Net exports = Exports - Imports Exports Imports
Spending on domestically produced goods by foreigners
Imports
Spending on foreign goods by domestic residents

10. The components of U.S. GDP
2007, GDP of the United States = $14 trillion
GDP per person = $45,838
Consumption = $32,225 per person
Investment = $7,061 per person
Government purchases = $8,912 per person
Net exports = –$2,360 per person

11. Real Versus Nominal GDP
Total spending rises from one year to the next
Economy - producing a larger output of goods and services
And/or goods and services are being sold at higher prices
Nominal GDP
Production of goods and services
Valued at current prices

12. Real Versus Nominal GDP
Real GDP
Production of goods and services
Valued at constant (or base year) prices
Designate one year as base year
Not affected by changes in prices
For the base year
Nominal GDP = Real GDP

13. 2 Real and Nominal GDP Prices and Quantities Year Price of hot dogs
Quantity of
hamburgers
2008
2009
2010 $1 $2 $3
100
150
200 $4 50
Calculating Nominal GDP
($1 per hot dog × 100 hot dogs) + ($2 per hamburger × 50 hamburgers) = $200
($2 per hot dog × 150 hot dogs) + ($3 per hamburger × 100 hamburgers) = $600
($3 per hot dog × 200 hot dogs) + ($4 per hamburger × 150 hamburgers) = $1,200
Calculating Real GDP (base year 2008)
($1 per hot dog × 150 hot dogs) + ($2 per hamburger × 100 hamburgers) = $350
($1 per hot dog × 200 hot dogs) + ($2 per hamburger × 150 hamburgers) = $500
Calculating the GDP Deflator
($200 / $200) × 100 = 100
($600 / $350) × 100 = 171
($1,200 / $500) × 100 = 240
This table shows how to calculate real GDP, nominal GDP, and the GDP deflator for a hypothetical economy that produces only hot dogs and hamburgers.

14. Real Versus Nominal GDP
The GDP deflator (all goods and services)
Measure of the price level for all goods and services – inflation at the national level
Ratio of nominal GDP to real GDP times 100
=100 for the base year
Measures the current level of prices relative to the level of prices in the base year
Inflation
Economy’s overall price level is rising

15. Real Versus Nominal GDP
Inflation rate
Percentage change in some measure of the price level from one period to the next
The GDP deflator
Can be used to take inflation out of nominal GDP (“deflate” nominal GDP)

16. Real GDP over recent history
The GDP data
Real GDP grows over time
Growth is not steady
Recession
Real GDP declines
Lower income
Rising unemployment
Falling profits
Increased bankruptcies

17. GNP Growth is Not Steady

18. Real GDP in the United States2
Real GDP in the United States
This figure shows quarterly data on real GDP for the U.S. economy since Recessions—periods of falling real GDP—are marked with the shaded vertical bars.

19. The Business Cycle – Another Look

20. Business Cycle - Phases

21. GDP - Good Measure of Economic Well-being?
GDP – “single measure of the economic well-being of a society”?
Measures both economy’s total income and total expenditure
Larger GDP correlated with
Good life
Better healthcare
Better educational systems

22. International differences in GDP and the quality of life
Rich countries - Higher GDP per person
Better
Life expectancy
Literacy
Internet usage
Poor countries - Lower GDP per person
Worse

23. GDP - Good Measure of Economic Well-being?
Does not consider how income is distributed (GINI coefficient)
A low Gini coefficient indicates a more equal distribution,
0 corresponding to complete equality,
higher Gini coefficients => more unequal
1 corresponding to complete inequality. When used as a measure of income inequality,
most unequal society will be one in which a single person receives 100% of the total income and the remaining people receive none (G = 1−1/N);
and the most equal society will be one in which every person receives the same income (G = 0).

24. Relative Income Distribution Rankings
U.S., Gini coefficient of 0.450, ranks near the extreme end of the inequality scale
comparable income inequality: Cameroon, Madagascar, Rwanda, Uganda, Ecuador.
China, significantly more equal than the U.S. with a Gini coefficient of 0.415

28. Equality of Distribution of Income

29. GDP - Good Measure of Economic Well-being?
GDP – not a perfect measure of well-being
Besides equality/inequality of distribution of income
Also doesn’t include value of
Leisure
Quality of the environment
Almost all activity that takes place outside markets (some legal, some not!)

30. GDP and the quality of life3
GDP and the quality of life
Country
Real GDP per
person (2005)
Life
expectancy
Adult literacy
(% of population)
Internet usage
United States
Japan
Germany
Russia
Mexico
Brazil
China
Indonesia
India
Pakistan
Bangladesh
Nigeria
$41,890
31,267
29,461
10,845
10,751
8,402
6,757
3,843
3,452
2,370
2,053
1,128
78 years 82 79 65 76 72 70 64 63 47
99% 99 92 89 91 90 61 50 69
63 % 67 45 15 18 19 9 7 3
0.3 4
The table shows GDP per person and three other measures of the quality of life for twelve major countries.