1 of 37 chapter: 7 >> Krugman/Wells ©2009  Worth Publishers Interpreting Real GDP.

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1 of 37 chapter: 7 >> Krugman/Wells ©2009  Worth Publishers Interpreting Real GDP

2 of 37 WHAT YOU WILL LEARN IN THIS CHAPTER  The difference between real GDP and nominal GDP.  Why real GDP is the appropriate measure of real economic activity.

3 of 37 Gross Domestic Product  Gross domestic product or GDP measures the total value of all final goods and services produced in the economy during a given year. It does not include the value of intermediate goods.  Aggregate spending, the sum of consumer spending, investment spending government purchases of goods an services, and exports minus imports, I the total spending on domestically produce final goods and services in the economy.

4 of 37 Calculating Gross Domestic Product  GDP can be calculated three ways:  Add up the value added of all producers  Add up all spending on domestically-produced final goods and services. This results in the equation: GDP = C + I + G + X - IM  Add up all income paid to factors of production

5 of 37 Calculating Gross Domestic Product

6 of 37 PITFALLS GDP: What’s In and What’s Out Included  domestically produced final goods and services (including capital goods)  new construction of structures  changes to inventories Not Included  intermediate goods and services  inputs  used goods  financial assets like stocks and bonds  foreign-produced goods and services

7 of 37 Calculating Gross Domestic Product $15,000 10,000 5, ,000 Value added by government = 11.5% Value added by households = 11.5% Value added by business = 77.1% Consumer spending = 70.3% Investment spending = 15.4% Government purchases of goods and services = 19.4% Components of GDP (billions of dollars) C + I + G = $14,515 Net exports X – IM = –$708 (– 5.1%) Spending on domestically produced final goods and services Value added by sector

8 of 37 Real vs. Nominal GDP  Real GDP is the total value of the final goods and services produced in the economy during a given year, calculated using the prices of a selected base year.  Nominal GDP is the value of all final goods and services produced in the economy during a given year, calculated using the prices current in the year in which the output is produced.

9 of 37 Real vs. Nominal GDP Calculating GDP and Real GDP in a Simple Economy Year 1Year 2 Quantity of apples (billions)2,0002,200 Price of apple$0.25$0.30 Quantity of oranges (billions)1,0001,200 Price of orange$0.50$0.70 GDP (billions of dollars)1,0001,500 Real GDP (billions of year 1 dollars)$1,000$1,150

10 of 37 Real vs. Nominal GDP  Except in the base year, real GDP is not the same as nominal GDP, output valued at current prices.  Chained dollars is the method of calculating changes in real GDP using the average between the growth rate calculated using an early base year and the growth rate calculated using a late base year.  GDP per capita is a measure of average GDP per person, but is not by itself an appropriate policy goal.

11 of 37 Real vs. Nominal GDP Nominal versus Real GDP in 1993, 2000, and 2007 Nominal GDP (billions of current dollars) Real GDP (billions of 2000 dollars) 1993$6,657$7, , ,80811,524

12 of 37 Real vs. Nominal GDP

13 of 37 ►ECONOMICS IN ACTION Miracle in Venezuela?  The South American nation of Venezuela has a distinction that may surprise you: in recent years, it has had one of the world’s fastest-growing nominal GDPs. Between 1997 and 2007, Venezuelan nominal GDP grew by an average of 28% each year—much faster than nominal GDP in the United States or even in booming economies like China.  So is Venezuela experiencing an economic miracle?

14 of 37 ►ECONOMICS IN ACTION Miracle in Venezuela?  No, it’s just suffering from unusually high inflation. Nominal GDP (billions of bolivars), Real GDP (billions of 1997 bolivars) Year VEB500, , , , ,000

15 of 37 SUMMARY 1.Real GDP is the value of the final goods and services produced calculated using the prices of a selected base year. Except in the base year, real GDP is not the same as nominal GDP, the value of aggregate output calculated using current prices. Analysis of the growth rate of aggregate output must use real GDP. Real GDP per capita is a measure of average aggregate output per person but is not in itself an appropriate policy goal. U.S. statistics on real GDP are always expressed in chained dollars.