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1、4MEASURING GDP ANDECONOMIC GROWTH宏觀經(jīng)濟(jì)結(jié)構(gòu)和運(yùn)行四個(gè)主體:家庭部門、企業(yè)部門、政府部門、外國部門三個(gè)市場(chǎng):生產(chǎn)要素市場(chǎng)、金融市場(chǎng)、產(chǎn)品市場(chǎng)兩個(gè)循環(huán): 實(shí)物循環(huán)、貨幣循環(huán)1.兩部門宏觀經(jīng)濟(jì)循環(huán)流量圖2.三部門宏觀經(jīng)濟(jì)循環(huán)流量圖3.四部門宏觀經(jīng)濟(jì)循環(huán)流量圖Gross Domestic Product GDP DefinedGDP or gross domestic product is the market value of all final goods and services produced in a country in a given time pe
2、riod.This definition has four parts:Market valueFinal goods and servicesProduced within a countryIn a given time periodMarket ValueGDP is a market valuegoods and services are valued at their market prices. To add apples and oranges, computers and popcorn, we add the market values so we have a total
3、value of output in dollars.Gross Domestic Product Final Goods and ServicesGDP is the value of the final goods and services produced. A final good (or service) is an item bought by its final user during a specified time period. A final good contrasts with an intermediate good, which is an item that i
4、s produced by one firm, bought by another firm, and used as a component of a final good or service.Excluding the value of intermediate goods and services avoids counting the same value more than once. Gross Domestic Product Produced Within a CountryGDP measures production within a countrydomestic pr
5、oduction.In a Given Time PeriodGDP measures production during a specific time period, normally a year or a quarter of a year.Gross Domestic Product GDP and the Circular Flow of Expenditure and eGDP measures the value of production, which also equals total expenditure on final goods and total e. The
6、equality of e and value of production shows the link between productivity and living standards.The circular flow diagram in Figure 4.1 illustrates the equality of e and expenditure. Gross Domestic Product The circular flow diagram shows the transactions among households, firms, governments, and the
7、rest of the world.Gross Domestic Product Households and FirmsHouseholds sell and firms buy the services of labor, capital, and land in factor markets.For these factor services, firms pay e to households: wages for labor services, interest for the use of capital, and rent for the use of land. A fourt
8、h factor of production, entrepreneurship, receives profit.In the figure, the blue flow, Y, shows total e paid by firms to households.Gross Domestic Product Gross Domestic Product Firms sell and households buy consumer goods and services in the goods market. Consumption expenditure is the total payme
9、nt for consumer goods and services, shown by the red flow labeled C .Firms buy and sell new capital equipment in the goods market and put unsold output into inventory.The purchase of new plant, equipment, and buildings and the additions to inventories are investment, shown by the red flow labeled I.
10、Gross Domestic Product Gross Domestic Product GovernmentsGovernments buy goods and services from firms and their expenditure on goods and services is called government expenditure.Government expenditure is shown as the red flow G.Governments finance their expenditure with taxes and pay financial tra
11、nsfers to households, such as unemployment benefits, and pay subsidies to firms.These financial transfers are not part of the circular flow of expenditure and e.Gross Domestic Product Gross Domestic Product Rest of the World Firms in the United States sell goods and services to the rest of the world
12、exportsand buy goods and services from the rest of the worldimports. The value of exports (X ) minus the value of imports (M) is called net exports, the red flow X M.If net exports are positive, the net flow of goods and services is from U.S. firms to the rest of the world.If net exports are negativ
13、e, the net flow of goods and services is from the rest of the world to U.S. firms.Gross Domestic Product Gross Domestic Product The blue and red flows are the circular flow of expenditure and e. Gross Domestic Product The sum of the red flows equals the blue flow.Gross Domestic Product That is: Y =
14、C + I + G + X MGross Domestic Product The circular flow shows two ways of measuring GDP.GDP Equals Expenditure Equals eTotal expenditure on final goods and services equals GDP.GDP = C + I + G + X M.Aggregate e equals the total amount paid for the use of factors of production: wages, interest, rent,
15、and profit.Firms pay out all their receipts from the sale of final goods, so e equals expenditure,Y = C + I + G + (X M).Gross Domestic Product Why Is Domestic Product “Gross”?“Gross” means before deducting the depreciation of capital. The opposite of gross is net. “Net” means after deducting the dep
16、reciation of capital.Gross Domestic Product Depreciation is the decrease in the value of a firms capital that results from wear and tear and obsolescence.Gross investment is the total amount spent on purchases of new capital and on replacing depreciated capital.Net investment is the increase in the
17、value of the firms capital.Net investment = Gross investment Depreciation.Gross Domestic Product Gross investment is one of the expenditures included in the expenditure approach to measuring GDP.So total product is a gross measure.Gross profit, which is a firms profit before subtracting depreciation
18、, is one of the es included in the e approach to measuring GDP.So total product is a gross measure.Gross Domestic Product Measuring U.S. GDPThe Bureau of Economic Analysis uses two approaches to measure GDP: The expenditure approach The e approach The Expenditure ApproachThe expenditure approach measures GDP as the sum of consumption expenditure, investment, government expenditure on goods and services, and net exports. GDP = C + I + G + (X M)Table 4.1 on
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