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宏观经济学课件(叶德磊)第一章引言1.1宏观经济学的定义与研究对象宏观经济学是研究国民经济总体运行规律的经济学分支。
它关注的是整个国家或地区在一定时期内的经济总量、经济结构、经济周期、通货膨胀、失业、经济增长等方面的问题。
宏观经济学的研究对象包括政府、企业、家庭等经济主体的行为以及它们之间的相互关系。
1.2宏观经济学与微观经济学的区别与联系微观经济学研究个体经济单位（如企业、家庭）的行为和决策，而宏观经济学关注整个国民经济总体的运行规律。
两者之间的联系在于，微观经济学的结论可以为宏观经济学提供理论依据，而宏观经济学的研究成果又可以指导微观经济学的实践。
1.3宏观经济学的核心问题宏观经济学关注的核心问题包括：经济增长、通货膨胀、失业、经济周期等。
这些问题涉及到国民经济的总体运行，对政策制定者和企业经营都具有重要意义。
第二章国民收入决定理论2.1国民收入的构成国民收入（GDP）是一个国家或地区在一定时期内生产的所有最终产品和服务的市场价值总和。
国民收入由消费、投资、政府支出和净出口四个部分构成。
2.2消费函数消费函数描述了消费与收入之间的关系。
凯恩斯消费函数认为，消费取决于收入，随着收入的增加，消费也会增加，但消费的增长幅度小于收入的增长幅度。
2.3投资函数投资函数描述了投资与利率之间的关系。
投资取决于预期收益和成本，其中利率是投资成本的重要组成部分。
当利率降低时，投资会增加，从而促进经济增长。
2.4总需求与总供给总需求（AD）是指在一定时期内，国民经济各部门对最终产品和服务的需求总和。
总供给（AS）是指在同一时期内，国民经济各部门生产最终产品和服务的总量。
当总需求等于总供给时，国民经济达到均衡状态。
第三章货币供求与通货膨胀3.1货币供求理论货币供求理论研究了货币市场的均衡状态。
货币供应量由央行控制，货币需求取决于人们的交易需求、预防需求和投机需求。
当货币供应量等于货币需求量时，货币市场达到均衡。
3.2通货膨胀的原因与影响通货膨胀是指物价水平持续上涨的现象。
第二章凯恩斯简单国民收入决定理论第一部分内容体系框架第二部分内容提要1．凯恩斯宏观理论与古典宏观理论的异同点相同点：古典理论的核心假设是自由竞争的市场经济制度，凯恩斯对此并未否定，凯思斯理论采用的一些概念和古典模型是完全相同的，甚至分析方法也是短期静态和比较静态的均衡分析方法，这些都是他从古典理论继承的。
不同点：(1)经济学研究的问题是相对稀缺的资源相对于无限需要的问题。
该问题包含了两个方面：一个是资源的使用效率问题，一个是资源的利用程度问题。
古典理论关注第一个方面，而凯恩斯理论则认为，第二个问题才应该是经济学研究的中心。
(2)古典理论认为“供给创造需求”，而凯恩斯认为，“需求创造供给”。
(3)古典理论认为，资本主义经济经常处于充分就业状态，而凯恩斯则认为，资本主义运行的常态是小于充分就业的均衡，这是有效需求不足造成的，而有效需求不足的原因是消费支出不足(边际消费倾向递减)和投资不足(资本的边际生产力递减)。
(4)古典理论认为，竞争性的市场制度足以保证充分就业的实现，政府的任务不过是维持公平竞争的市场秩序，其余则任凭市场机制决定。
凯恩斯认为，既然竞争件的市场制度无法使得有效需求达到充分就业水平，那么政府就应当责无旁贷的承担起需求管理的职责，积极干预经济生活。
(5)古典理论认为货币工资的调整是迅速完成的，而凯思斯理论则认为，货币工资具有刚性，在一定时期内固定不变。
(6)古典理论认为，储蓄是利率的函数，从而暗含者消费也是利率的函数的假定，人们的投资与储蓄的均衡是通过利率的变化来实现的。
而凯恩斯则认为，消费(从而储蓄)主要取决于收入，并且认为，储蓄与投资的均衡是通过收入的变化来实现的。
(7)古典理论认为，资本供求是利率的函数，而凯思斯认为，利率是由货币供求决定的。
(8)古典理论认为，货币是中性的，不能影响实际产出，而凯恩斯则认为，既然利率是由货币市场的供求关系决定的，则货币供应量的增加会导致利率下降，货币不再是中性的，货币市场与产品市场不再一分为二，而是合二为一。
可编辑修改精选全文完整版宏观经济学课件chapter02Macroeconomics, 6e (Blanchard/Johnson)Chapter 2: A Tour of the Book2.1 Multiple Choice Questions1) Fill in the blank for the following: GDP is the value of all ________ produced in a given period.A) final and intermediate goods and services produced by the private sector onlyB) final goods and servicesC) final and intermediate goods and services, plus raw materialsD) all of the aboveE) none of the aboveAnswer: BDiff: 12) When using the income approach to measure GDP, the largest share of GDP generally consists ofA) interest income.B) labor income.C) indirect taxes.D) profits.E) capital income.Answer: BDiff: 13) For this question, assume that 1980 is the base year. Given macroeconomic conditions in the United States over the past three decades, we know thatA) nominal GDP is always smaller than real GDP since 1980.B) real GDP and nominal GDP would be equal for the entire period.C) real GDP is larger than nominal GDP from 2002 to 2008.D) real GDP and nominal GDP were equal in 1980.E) none of the aboveAnswer: DDiff: 24) Suppose nominal GDP increased in a given year. Based on this information, we know with certainty thatA) real output has increased.B) the price level (GDP deflator) has increased.C) real output and the price level (GDP deflator) have both increased.D) either real output or the price level (GDP deflator) have increased.E) real output has increased and the price level has decreased.Answer: DDiff: 25) Use the following information to answer this question. If nominal GDP rises from $100 trillion to $120 trillion, while the GDP deflator rises from 2.0 to 2.2, the percentage change in real GDP is approximately equal toA) -10%.B) 10%.C) 20%.D) 9.1%.E) 0%.Answer: DDiff: 26) Hedonic pricing isA) the way that luxury goods are priced in a market economy.B) the tendency for the inflation rate to rise by greater and greater amounts.C) the tendency for nominal GDP to rise when the price level rises.D) the process of translating nominal GDP into real GDP.E) the process of pricing individual characteristics of a good or service.Answer: EDiff: 17) In a given year, suppose a company spends $100 million on intermediate goods and $200 million on wages, with no other expenses. Also assume that its total sales are $800 million. The value added by this company equalsA) $200 million.B) $300 million.C) $500 million.D) $700 million.E) $800 million.Answer: DDiff: 28) A firm's value added equalsA) its revenue minus all of its costs.B) its revenue minus its wages.C) its revenue minus its wages and profit.D) its revenue minus its cost of intermediate goods.E) none of the aboveAnswer: DDiff: 29) Suppose you are provided with the following data for yourcountry for a particular month: 200 million people are working, 20 million are not working but are looking for work, and 40 million are not working and have given up looking for work. The official unemployment rate for that month isA) 7.7%.B) 9.1%.C) 10%.D) 23%.E) 30%.Answer: BDiff: 110) In the United States, someone is classified as unemployed if he or sheA) does not have a job.B) does not have a job, or else has a job but is looking for a different one while continuing to work.C) does not have a job, has recently looked for work, and is collecting unemployment insurance.D) does not have a job, and is collecting unemployment insurance.E) none of the aboveAnswer: EDiff: 111) An individual is said to be a discouraged worker if he or sheA) is working, but prefers not to work.B) is working part time, but would prefer a full time job.C) is working in jobs she/he is not suited for.D) wants to work, and is actively searching for a job.E) wants to work, but has given up searching for a job.Answer: EDiff: 112) Which of the following tends to occur when the unemployment rate increases?A) a reduction in the labor force participation rateB) a reduction in the number of discouraged workersC) an increase in the number of employed workersD) all of the aboveE) none of the aboveAnswer: ADiff: 113) Labor income's share in an advanced country is likely to beA) 70%.B) 45%.C) 29%.D) 10%.E) none of the aboveAnswer: ADiff: 214) The labor force in the United States is defined asA) the total number of individuals who are employed.B) the sum of the total number of individuals who are employed and the officially unemployed.C) the sum of the total number of individuals who are employed, the officially unemployed, and discouraged workers.D) the total number of individuals who are 16 years old and older, but not retired.E) none of the aboveAnswer: BUse the information provided below to answer the following questions.Suppose a country using the United States' system of calculating official unemployment statistics has 100 million people, of whom 50 million are working age. Of these 50 million, 20 million have jobs. Of the remainder: 10 million are actively searching for jobs; 10 million would like jobs but are not searching; and 10 million do not want jobs at all.15) Refer to the information above. The labor force isA) 20 million.B) 40 million.C) 60 million.D) 80 million.E) 100 million.Answer: CDiff: 216) Refer to the information above. The labor force participation rate isA) .2.B) .3.C) .4.D) .6.E) .8.Answer: DDiff: 217) Refer to the information above. The official unemployment rate isA) .1.B) .2.D) .4.E) .66.Answer: CDiff: 218) The GDP deflator provides a measure of which of the following?A) the ratio of GDP to the size of the populationB) the ratio of GDP to the number of workers employedC) the ratio of nominal GDP to real GDPD) the price of a typical consumer's basket of goodsE) real GDP divided by the aggregate price levelAnswer: CDiff: 119) Which of the following calculations will yield the correct measure of real GDP?A) divide nominal GDP by the consumer price indexB) divide the GDP deflator by the consumer price indexC) multiply nominal GDP by the consumer price indexD) multiply nominal GDP by the GDP deflatorE) none of the aboveAnswer: EDiff: 220) The prices for which of the following goods are included in both the GDP deflator and the consumer price index?A) goods bought by householdsB) goods bought by firmsC) good bought by governmentsD) goods bought by foreign households (i.e., exports)E) all of the aboveAnswer: ADiff: 221) Suppose we switch the base year from 2000 to 2008. This change in the base year will causeA) nominal GDP in every year to increase.B) nominal GDP in every year to decrease.C) both nominal and real GDP in every year to decrease.D) real GDP in every year to decrease.E) none of the aboveAnswer: EDiff: 222) Pure inflation occurs whenA) nominal wages rise faster than all prices.B) all prices rise faster than nominal wages.C) all prices and nominal wages rise by the same percentage.D) the GDP deflator and Consumer Price Index rise by the same percentage.E) none of the aboveAnswer: CDiff: 223) One of the reasons macroeconomists have concerns about inflation is that inflation causesA) real GDP to rise.B) nominal GDP to fall.C) wages to rise as fast as prices.D) real GDP to exceed nominal GDP.E) none of the aboveAnswer: EDiff: 124) Changes in GDP in the short run are caused primarily byA) demand factors.B) supply factors.C) technology.D) capital accumulation.E) all of the aboveAnswer: ADiff: 225) Changes in GDP in the medium run are determined primarily byA) demand factors.B) supply factors.C) monetary policy.D) all of the aboveAnswer: BDiff: 226) Changes in GDP in the long run are determined primarily byA) monetary policy.B) fiscal policy.C) demand.D) all of the aboveE) none of the aboveAnswer: EDiff: 227) Which of the following prices will be used when calculating the rate of growth of real GDP between the year's 2005 and 2006 using the chain method?A) prices in the base year (2002)B) prices in 2005C) prices in 2006D) the average of prices in 2005 and 2006E) prices in 2005, 2006, and in 2002 (the base year)Answer: DDiff: 228) Which of the following factors is NOT believed to affect output in the long run?A) technologyB) monetary policyC) the size of the labor forceD) the capital stockAnswer: BDiff: 129) The Okun's law shows the relationship betweenA) inflation and unemployment rate.B) output growth and unemployment.C) inflation and output growth.D) output growth and money supply.Answer: BDiff: 230) The Phillips curve describes the relationship betweenA) output growth and unemployment.B) inflation and output growth.C) output growth and money supply.D) inflation and unemployment .Answer: DDiff: 231) Prices for which of the following are included in the GDP deflator, but not included in the Consumer Price Index?A) firms' purchases of new equipmentB) intermediate goods and servicesC) consumption of goodsD) consumption of servicesAnswer: ADiff: 132) Macroeconomists are concerned about changes in the unemployment rate because changes in the unemployment rate provide information aboutA) the state of the economy.B) the welfare of those who are unemployed.C) none of the aboveD) both A and BAnswer: DDiff: 133) Based on the notation presented in Chapter 2, which of the following expressions represents nominal GDP?A) Y tB) P t Y tC) Y t/P tD) $Y t/P tAnswer: BDiff: 134) Deflation generally occurs when which of the following occurs?A) the consumer price index is greater than the GDP deflatorB) the consumer price index decreasesC) the rate of inflation falls, for example, from 4% to 2%D) nominal GDP does not changeAnswer: BDiff: 135) During the mid-1980s, we observed a significantreduction in oil prices. In the United States, we would expect that this reduction in oil prices would causeA) a larger reduction in the CPI compared to the GDP deflator.B) an equal reduction in the CPI and GDP deflator.C) a larger reduction in the GDP deflator compared to the CPI.D) no change in the CPI and a reduction in the GDP deflator.Answer: ADiff: 236) Suppose nominal GDP in 2009 does not change (compared its previous level in 2008). Given this information, we know with certainty thatA) real GDP increased during 2009.B) the GDP deflator increased during 2009.C) both the GDP deflator and real GDP fell during 2009.D) more information is needed to answer this question.Answer: DDiff: 237) During the late 1990s, Japan experienced reductions in the GDP deflator. Given this information, we know with certainty thatA) real GDP fell during these periods.B) real GDP did not change during these periods.C) the overall price level in Japan decreased during these periods.D) both real GDP and the overall price level decreased during these periods. Answer: CDiff: 238) Hedonic pricing is used toA) convert nominal values to real values.B) calculate the difference between nominal GDP and real GDP.C) measure the rate of change in real GDP.D) obtain chain-weight indexes.E) none of the aboveAnswer: EDiff: 139) GDP in current dollars is equivalent to which of the following?A) real GDPB) GDP in terms of goodsC) GDP in 2000 dollarsD) GDP in constant dollarsE) none of the aboveAnswer: EDiff: 140) Which of the following does NOT represent real GDP?A) GDP in current dollarsB) GDP in terms of goodsC) GDP in base year dollarsD) GDP in constant dollarsAnswer: ADiff: 141) which of the following represents real GDP?A) GDP in constant dollarsB) GDP in terms of goodsC) GDP in base year dollarsD) all of aboveAnswer: ADiff: 142) According to convention, a recession is referred to if an economy goes throughA) at least two consecutive quarters of negative growthB) at least three consecutive quarters of negative growthC) at least four quarters of negative growthD) at least two consecutive months of negative growthAnswer: ADiff: 143) Based on the notation presented in Chapter 2, which of the following expressions represents real GDP?A) Y tB) P t Y tC) Y t/P tD) $Y t/P tAnswer: ADiff: 144) Measures of aggregate output have been published on a regular basis in the United States sinceA) 1947.B) 1933.C) 1917.D) 1946.Answer: ADiff: 145) Which of the following about capital income is NOT correct?A) it refers to a firm's revenue.B) it is also called profit income.C) it goes to the firms.D) it accounts for less than 35% of income in advancedcountries.Answer: ADiff: 146) Which of the following about the Phillips curve is NOT correct?A) It shows the relation between GDP growth and unemployment.B) It has been redefined as a relation between the change in the rate of inflation and the unemployment rate.C) It was first explored by A. W. Phillips.D) The curve is downward sloping.Answer: ADiff: 12.2 Essay Questions1) Explain the three ways GDP can be measured.Answer: GDP can be measured three ways. First, GDP represents the market value of the final goods and services produced in the economy during a given period. This would be obtained by adding C, I, G, and NX. Second, GDP is the sum of the value added by firms. The value added for a firm equals the value of the production (at that stage of the production process) minus the value of the intermediate goods (excluding labor services). The final value of aggregate output can be calculated by either summing the value of all final goods and services OR by summing the value added of all goods and services at each stage of production. And finally, GDP is also the sum of all incomes earned in a given period.2) First, define nominal GDP and real GDP. Second, is it possible for nominal GDP in a year to be less than real GDP in the same year? Explain.Answer: Nominal GDP represents the value of goods and services produced using current prices. Real GDP measures the value of the same goods and services using some base year prices. It is possible for nominal GDP to be less than real GDP in a given year. Given the definitions of the two variables, this will occur if prices in that year are simply less than prices in the base year. If, for example, the base year is 2002, it will generally be the case that nominal GDP will be less than real GDP for those years prior to 2002 given that prices have generally risen in all years. 3) Explain whether it is possible for nominal GDP to increase and real GDP to decrease in the same period.Answer: Nominal GDP can rise because either the price level is rising or the real quantity of goods and services produced has increased. Nominal GDP can increase while real GDP falls if the increase in the aggregate price level is larger (in a proportionate sense) than the drop in real economic activity.4) Explain the difference between the unemployment rate and the participation rate.Answer: The unemployment rate is the percentage of the labor force (those employed and unemployed) that is unemployed. The participation rate is the percentage of the working age population that is in the labor force.5) Explain how the existence of discouraged workers alters the extent to which the official unemployment provides an accurate measure of the use of labor resources.Answer: Discouraged workers are those individuals who have decided to stop searching for employment because they have become "discouraged" about employment opportunities. At some point, these individuals will no longer be considered as part of the labor force. The existence of discouraged workers willcause the official unemployment rate to provide an under-estimate of the underutilization of labor.6) Briefly explain why the reported official unemployment rate in Spain in 1994 may have provided an over-estimate of unemployment in Spain.Answer: The relatively high unemployment rate in Spain is partly the result of a relatively large underground economy. The underground economy is that part of the economy not measured in official statistics. After taking into account those individuals who are "employed" in the underground economy, the unemployment rate in Spain would have been lower (but still relatively high).7) What are the social and economic implications of unemployment? Explain.Answer: Economic implications: signal of economic activity and measure of the utilization of labor. Social implications: the emotional and psychological suffering that occurs as a result of being unemployed.8) Explain what factors cause changes in output in: (1) the short run; (2) medium run; and (3) long run.Answer: In the short run, demand factors primarily cause changes in output. In the medium run, factors such as the technology, amount of capital, and the skill and size of the labor force (supply factors) affect output. And in the long run, the education system, saving rate, and role of government affect economic activity.9) Will the CPI and GDP deflator always move together? Explain.Answer: No they will not. Some of the goods included in the GDP deflator (some investment goods) are not included in theCPI. Some of the goods included in the CPI (foreign goods) are not included in the GDP deflator.10) Explain how inflation can lead to distortions.Answer: First, not all prices and wages adjust automatically when inflation occurs. Second, variations in relative prices (which occur when there is not pure inflation) can lead to uncertainty. Inflation can also lead to distortions if the tax system is not adjusted when inflation occurs (e.g. nominal income tax brackets).11) Explain why economists care about inflation.Answer: Inflation will cause relative prices to change. It will also cause changes in the distribution of income. Inflation will lead to other distortions such as tax distortions and uncertainty.12) Explain Okun's Law.Answer: It shows the relationship between GDP growth and unemployment rate. If output growth is high, unemployment will decrease.13) Explain the Phillips curve.Answer: It shows the negative relationship between inflation rate and unemployment rate. After 1970s, it was redefined as the relationship between the change in the rate of inflation and the unemployment rate.14) Explain why the Phillips curve on average is downward sloping.Answer: When unemployment becomes very low, the economy is likely to overheat and this will lead to upward pressure on inflation.15) Explain why economists care about unemployment.Answer: First, they care about unemployment because of its direct effect on the welfare of the unemployed. Unemployment is often associated with financial and psychological suffering.Second, they care about unemployment because it provides a signal that the economy may not be using some of its resources efficiently.16) Can an economy maintain high output growth, low unemployment, and low inflation at the the same time? Explain.Answer: It would be very hard to achieve the three objectives at the same time. High output growth leads to low unemployment, which is likely to put pressure on inflation.。
