Economics2e-Ch19.pptx

PRINCIPLES OF ECONOMICS 2e

Chapter 19 The Macroeconomic Perspective

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COLLEGE PHYSICS

Chapter # Chapter Title

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CH.6 OUTLINE

6.1: Measuring the Size of the Economy: Gross

Domestic Product

6.2: Adjusting Nominal Values to Real Values

6.3: Tracking Real GDP over Time

6.4: Comparing GDP among Countries

6.5: How Well GDP Measures the Well-Being of

Society

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The Great Depression

At times, such as when many people have trouble making ends meet, it is easy to tell how the economy is doing.

This photograph shows people lined up during the Great Depression, waiting for relief checks.

At other times, when some are doing well and others are not, it is more difficult to ascertain how the economy of a country is doing. (Credit: modification of work by the U.S. Library of Congress/Wikimedia Commons)

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Macroeconomic Goals, Framework, and Policies

This chart shows what macroeconomics is about:

Goals – a consensus of what are the most important goals for the macro economy.

Framework – what economists use to analyze macroeconomic changes (such as inflation or recession).

Policy Tools – the tools the federal government uses to influence the macro economy.

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6.1 Measuring the Size of the Economy:

Gross Domestic Product

Gross domestic product (GDP) – the value of the output of all final goods and services produced within a country in a given year.

Measures the size of a nation’s overall economy.

An economy's GDP can be measured by either:

the total dollar value of what consumers purchase in the economy.

the total dollar value of what the country produces.

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GDP Measured by Components of Demand

Who buys all of a country’s production?

Demand for production can be divided into four main parts:

consumer spending (consumption)

business spending (investment)

government spending on goods and services

spending on net exports

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Percentage of Components of 2016

U.S. GDP on the Demand Side

Consumption makes up over half of the demand side components of the GDP. (Source: http://bea.gov/iTable/index_nipa.cfm)

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Components of GDP on the Demand Side

For graph (a):

Consumption is about two-thirds of GDP, but it moves relatively little over time.

Business investment hovers around 15% of GDP, but it increases and declines more than consumption.

Government spending on goods and services is around 20% of GDP.

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Components of GDP on the Demand Side, Continued

For graph (b):

Exports are added to total demand for goods and services, while imports are subtracted from total demand.

If exports exceed imports, as in most of the 1960s and 1970s in the U.S. economy, a trade surplus exists.

If imports exceed exports, as in recent years, then a trade deficit exists. (Source: http://bea.gov/iTable/index_nipa.cfm)

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Net Export Component

The GDP net export component, or trade balance, is equal to the dollar value of exports (X) minus the dollar value of imports (M).

Trade balance – the gap between exports and imports.

Trade balance = (X – M)

Trade surplus – when a country’s exports are larger than its imports; calculated as exports – imports.

Trade deficit – when a country’s imports exceed exports; calculated as imports – exports.

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GDP Using Demand

Based on the four components of demand, GDP can be measured as:

GDP = Consumption + Investment + Government + Trade balance

OR

GDP = C + I + G + (X – M)

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GDP Measured by What is Produced

Production can be divided into five main parts:

Durable goods – long-lasting good like a car or a refrigerator.

Nondurable goods – short-lived good like food and clothing.

Services – product which is intangible (in contrast to goods) such as entertainment, healthcare, or education.

Structures – building used as residence, factory, office building, retail store, or for other purposes.

Change in inventories – good that has been produced, but not yet been sold.

Every market transaction must have both a buyer and a seller, so GDP must be the same whether measured by what is demanded or by what is produced.

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Percentage of Components of GDP on the Production Side

Services make up over 60 percent of the production side components of GDP in the United States.

Note that the change in inventories is not shown since it is typically less than 1% of GDP.

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Types of Production

Services are the largest single component of total supply, representing over 60 percent of GDP, up from about 45 percent in the early 1960s.

Durable and nondurable goods constitute the manufacturing sector, and they have declined from 45 percent of GDP in 1960 to about 30 percent in 2016.

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Types of Production, Continued

Nondurable goods used to be larger than durable goods, but in recent years, nondurable goods have been dropping to below the share of durable goods, which is less than 20% of GDP.

Structures hover around 10% of GDP.

The change in inventories is not shown here since it is typically less than 1% of GDP.

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The Problem of Double Counting

Final goods and services – output used directly for consumption, investment, government, and trade purposes.

Goods at the furthest stage of production at the end of a year.

-vs.-

Intermediate goods – output provided to other businesses at an intermediate stage of production, not for final users.

Excluded from GDP calculation.

Double counting – output that is counted more than once as it travels through the stages of production.

A potential mistake to avoid in measuring GDP.

GDP is the dollar value of all final goods and services produced in the economy in a year.

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Other Ways to Measure the Economy

Gross national product (GNP) – includes what is produced domestically and what is produced by domestic labor and business abroad in a year.

Net national product (NNP) – GNP minus the value of depreciation.

Depreciation – the process by which capital ages over time and therefore loses its value.

NNP can be further subdivided into national income – includes all income earned: wages, profits, rent, and profit income.

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6.2 Adjusting Nominal Values to

Real Values

Nominal value – the economic statistic actually announced at that time; not adjusted for inflation.

-vs.-

Real value – an economic statistic after it has been adjusted for inflation.

Generally, the real value is more important.

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U.S. Nominal GDP, 1960–2010

Nominal GDP values have risen exponentially from 1960 through 2010, according to the BEA.

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GDP Deflator, 1960–2010

The GDP deflator is a price index measuring the average prices of all goods and services included in the economy.

Much like nominal GDP, the GDP deflator has risen exponentially from 1960 through 2010. (Source: BEA)

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Calculating Real GDP

Real GDP = Nominal GDP

Price Index / 100

Notes:

Price index is the same as GDP deflator.

For simplicity, the price index is traditionally published after being multiplied by 100 in order to get an integer number.

So, remember to divide the published price index by 100 when doing the math.

Whenever a real statistic is computed, one year (or period) is called the base year (or base period).

The base year is the year whose prices we use to compute the real statistic.

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Example: Calculating Real GDP

To calculate the real GDP in 1960:

Real GDP = Nominal GDP

Price Index / 100

= $543.3 billion

19 / 100

= $2,859.5 billion

2005 is the base year.

Question: What will the Real GDP be in 2005? Why?

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Example: Calculating Real GDP,

Continued

To calculate the real GDP in 2010:

Real GDP = Nominal GDP

Price Index / 100

= $14,958.3 billion

110 / 100

= $13,598.5 billion

As long as inflation is positive (prices increase on average from year to year) real GDP should be less than nominal GDP in any year after the base year.

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U.S. Nominal and Real GDP, 1960–2012

The black line measures U.S. GDP in real dollars, where all dollar values are converted to 2005 dollars.

Since we express real GDP in 2005 dollars, the two lines cross in 2005.

Real GDP will appear higher than nominal GDP in the years before 2005, because dollars were worth less in 2005 than in previous years.

Conversely, real GDP will appear lower in the years after 2005, because dollars were worth more in 2005 than in later years.

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Example: Calculating Real GDP

Growth Rate

What was the real GDP growth rate from 1960 to 2010?

2010 real GDP – 1960 real GDP = % change

1960 real GDP × 100

13,598.5 – 2,859.5 = 376%

2,859.5 × 100

The U.S. economy increased real production of goods and services by nearly a factor of four since 1960.

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6.3 Tracking Real GDP over Time

Governments report GDP growth as an annualized rate.

When analyzing growth in a quarter, the calculated growth in real GDP for the quarter is multiplied by four when it is reported (as if the economy were growing at that rate for a full year).

Recession – a significant decline in national output/GDP.

Depression – an especially lengthy and deep decline in output.

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U.S. GDP, 1900–2016

Real GDP in the United States in 2016 (in 2009 dollars) was about $16.7 trillion.

After adjusting to remove the effects of inflation, this represents a roughly 20-fold increase in the economy’s production of goods and services since the start of the twentieth century. (Source: bea.gov)

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Patterns of Recessions and Expansions

Peak – during the business cycle, the highest point of output before a recession begins.

Trough – during the business cycle, the lowest point of output in a recession, before a recovery begins.

A recession lasts from peak to trough, and an economic upswing runs from trough to peak.

Business cycle – the economy's relatively short-term movement in and out of recession

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6.4 Comparing GDP among Countries

To compare the GDP of countries with different currencies, it is necessary to convert to a “common denominator” using an exchange rate.

Exchange rate – the value or price of one currency in terms of another currency.

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Example: Converting GDP to a Common Currency

Example: Compare Brazil’s GDP in 2013 of 4.8 trillion reals with the U.S. GDP of $16.6 trillion for the same year.

In 2013, the exchange rate was 2.157 reals = $1.

Convert Brazil’s GDP into U.S. dollars:

Brazil's GDP in $U.S. = Brazil's GDP in reals

Exchange rate (reals/$ U.S.)

= 4.845 trillion reals

2.157 reals per $ U.S.

= $2.246 trillion GDP

Compare this value to the GDP in the United States in the same year.

The U.S. GDP was $16.6 trillion in 2013, which is nearly eight times that of GDP in Brazil.

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GDP Per Capita

The U.S. economy has the largest GDP in the world, and is also a populous country.

Is its economy also larger on a per-person basis?

GDP per capita – the GDP divided by the population.

GDP per capita = GDP

population

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6.5 How Well GDP Measures the

Well-Being of Society

Standard of living – all elements that affect people’s happiness and well-being, whether they are bought and sold in the market or not.

Difference between GDP and standard of living.

GDP does not include:

leisure time

actual levels of environmental cleanliness, health, and learning

production that is not exchanged in the market

the level of inequality in society

what technology and products are available

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