曼昆《宏观经济学》(第五版)课堂讲义(英文)Ch04.pptx

《曼昆《宏观经济学》(第五版)课堂讲义(英文)Ch04.pptx》由会员分享，可在线阅读，更多相关《曼昆《宏观经济学》(第五版)课堂讲义(英文)Ch04.pptx（27页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、MoneyStock of assetsUsed for transactionsA type of wealthWithout MoneySelf-sufficiencyBarter economy第1页/共27页Functions of MoneyStore of valueUnit of accountMedium of exchangeThe ease with which money is converted into other things-goods and services-is sometimes called moneys liquidity.第2页/共27页第3页/共2

2、7页Fiat money is money by declaration.It has no intrinsic value.Commodity money is money thathas intrinsic value.When people use gold as money,the economy is said to be on a gold standard.第4页/共27页The money supply is the quantity of money available in an economy.The control over the money supply is ca

3、lled Monetary Policy.In the United States,monetary policy is conducted in a partially independent institution called the Federal Reserve,or the Fed.第5页/共27页 To expand the Money Supply:The Federal Reserve buys U.S.Treasury Bonds and pays for them with new money.To reduce the Money Supply:The Federal

4、Reserve sells U.S.Treasury Bonds and receives the existing dollars and then destroys them.The bearer of the United StatesTreasury bond is hereby promisedthe repayment of the principlevalue plus the interest which itincurs through the terms statedthereof.The United States will justly repayits bearers

5、 in its entirety andwill not default under any circumstances.Signature of the President _US.Treasury Bond第6页/共27页The Federal Reserve controls the money supply in three ways.1)Open Market Operations(buying and selling U.S.Treasury bonds).2)D Reserve requirements(never really used).3)D Discount rate w

6、hich member banks(not meeting the reserve requirements)pay to borrow from the Fed.The bearer of the United StatesTreasury bond is hereby promisedthe repayment of the principlevalue plus the interest which itincurs through the terms statedthereof.The United States will justly repayits bearers in its

7、entirety andwill not default under any circumstances.Signature of the President _US.Treasury Bond第7页/共27页The quantity equation is an identity:the definitions of the four variables make it true.If one variable changes,one or more of the others must also change to maintain the identity.The quantity eq

8、uation we will use from now on is the money supply(M)times the velocity of money(V)which equals price(P)times output(Y):Money Velocity =Price Output M V =P YBecause Y is also total income,V in the quantity equations is called the income velocity of money.This tells us the number of times a dollar bi

9、ll changes hands in a given period of time.第8页/共27页Lets now express the quantity of money in terms of the quantity ofgoods and services it can buy.This amount,M/P is called real money balances.Real money balances measure the purchasing power of the stock of money.A money demand function is an equati

10、on that shows what determines the quantity of real money balances people wish to hold.Here is a simple money demand function:where k is a constant that tells us how much money people want to hold for every dollar they earn.This equation states that the quantity of real money balances demanded is pro

11、portional to real income.(M/P)d=k Y第9页/共27页The money demand function is like the demand function for a particular good.Here the“good”is the convenience of holding real money balances.Higher income leads to a greater demand for real money balances.The money demand equation offers another way to view

12、the quantity equation(MV=PY)where V=1/k.This shows the link between the demand for money and the velocityof money.When people hold a lot of money for each dollar of income(k is large),money changes hands infrequently(V is small).Conversely,when people want to hold only a little money(k is small),mon

13、ey changes hands frequently(V is large).In other words,the money demand parameter k and the velocity of money V are opposite sides of the same coin.第10页/共27页The Assumption of Constant VelocityThe quantity equation can be viewed as a definition:it defines velocity V as the ratio of nominal GDP,PY,to

14、the quantity of money M.But,if we make the assumption that the velocity of money is constant,then the quantity equation MV=PY becomes a useful theory of the effects of money.So,lets hold it constant!MV=PY第11页/共27页Three building blocks that determine the economys overall level of prices:1)The factors

15、 of production and the production function determinethe level of output Y.2)The money supply determines the nominal value of output,PY.This follows from the quantity equation and the assumption thatthe velocity of money is fixed.3)The price level P is then the ratio of the nominal value of output,PY

16、,to the level of output Y.第12页/共27页In other words,if Y is fixed(from Chapter 3)because it dependson the growth in the factors of production and on technological progress,and we just made the assumption that velocity is constant,or in percentage change form:MV=PY%Change in M+%Change in V=%Change in P

17、+%Change in Yif V is fixed and Y is fixed,then it reveals that%Change in M is what induces%Changes in P.The quantity theory of money states that the central bank,whichcontrols the money supply,has the ultimate control over the inflation rate.If the central bank keeps the money supply stable,the pric

18、e level will be stable.If the central bank increases the money supply rapidly,the price level will rise rapidly.第13页/共27页The revenue raised through the printing of money is called seigniorage.When the government prints money to finance expenditure,it increases the money supply.The increase in the mo

19、ney supply,in turn,causes inflation.Printing money to raise revenue is like imposing an inflation tax.第14页/共27页第15页/共27页Economists call the interest rate that the bank pays the nominalinterest rate and the increase in your purchasing power thereal interest rate.This shows the relationship between th

20、e nominal interest rateand the rate of inflation,where r is real interest rate,i is the nominal interest rate and p is the rate of inflation,and rememberthat p is simply the percentage change of the price level P.r=i p第16页/共27页The Fisher Equation illuminates the distinction between the real and nomi

21、nal rate of interest.Fisher Equation:i=r+pActual(Market)Actual(Market)Nominal rate ofNominal rate ofinterestinterestReal rateReal rateof interestof interestInflationInflationThe one-to-one relationshipbetween the inflation rate and the nominal interest rate isthe Fisher Effect.It shows that the nomi

22、nal interest can change for two reasons:becausethe real interest rate changes or because the inflation rate changes.第17页/共27页%Change in M+%Change in V=%Change in P+%Change in Y%Change in M+%Change in V=p +%Change in Yi=r+pThe quantity theory and the Fisher equation together tell us how money growth

23、affects the nominal interest rate.According to the quantity theory,an increase in the rate of money growth of one percent causes a 1%increase in the rate of inflation.According to the Fisher equation,a 1%increase in the rate of inflation in turn causes a 1%increase in the nominal interest rates.Here

24、 is the exact link between our two familiar equations:The quantity equation in percentage change form and the Fisher equation.第18页/共27页The real interest rate the borrower and lender expect when a loan is made is called the ex ante real interest rate.The real interestrate that is actually realized is

25、 called the ex post real interest rate.Although borrowers and lenders cannot predict future inflation withcertainty,they do have some expectation of the inflation rate.Let pdenote actual future inflation and pe the expectation of future inflation.The ex ante real interest rate is i-pe,and the ex pos

26、t real interest rate isi-p.The two interest rates differ when actual inflation p differs fromexpected inflation pe.How does this distinction modify the Fisher effect?Clearly the nominalinterest rate cannot adjust to actual inflation,because actual inflationis not known when the nominal interest rate

27、 is set.The nominal interestrate can adjust only to expected inflation.The next slide presents amore precise version of the the Fisher effect.第19页/共27页 i=r+peThe ex ante real interest rate r is determined by equilibrium in themarket for goods and services,as described by the model inChapter 3.The no

28、minal interest rate i moves one-for-one withchanges in expected inflation pe.第20页/共27页The quantity theory(MV=PY)is based on a simple money demand function:it assumes that the demand for real money balances is proportional to income.But,we need another determinant of the quantity of money demanded th

29、e nominal interest rate.The nominal interest rate is the opportunity cost of holding money:it is what you give up by holding money instead of bonds.So,the newgeneral money demand function can be written as:(M/P)d=L(i,Y)This equation states that the demand for the liquidity of real moneybalances is a

30、 function of income(Y)and the nominal interest rate(i).The higher the level of income Y,the greater the demand for realmoney balances.第21页/共27页The inconvenience of reducing moneyholding is metaphorically called theshoe-leather cost of inflation,becausewalking to the bank more often inducesones shoes

31、 to wear out more quickly.When changes in inflation require printingand distributing new pricing information,then,these costs are called menu costs.Another cost is related to tax laws.Oftentax laws do not take into considerationinflationary effects on income.第22页/共27页Unanticipated inflation is unfav

32、orable because it arbitrarily redistributes wealth among individuals.For example,it hurts individuals on fixed pensions.Often thesecontracts were not created in real terms by being indexed to a particular measure of the price level.There is a benefit of inflation many economists say that someinflati

33、on may make labor markets work better.They say it“greases the wheels”of labor markets.第23页/共27页Hyperinflation is defined as inflation that exceeds 50 percent per month,which is just over 1%a day.Costs such as shoe-leather and menu costs are much worse with hyperinflation and tax systems are grossly

34、distorted.Eventually,when costs become too great with hyperinflation,the money loses its role as store of value,unit of account and medium of exchange.Bartering or using commodity money becomes prevalent.第24页/共27页Economists call the separation of the determinants of real and nominal variables the cl

35、assical dichotomy.It suggests that changes in the money supply do not influence real variables.This irrelevance of money for real variables is called monetary neutrality.For the purpose of studying long-run issues-monetary neutrality is approximately correct.第25页/共27页InflationHyperinflationMoneyStor

36、e of valueUnit of accountMedium of exchangeFiat moneyCommodity moneyGold StandardMoney supplyMonetary policyCentral BankFederal ReserveOpen-market operationsCurrencyDemand depositsQuantity equationTransactions velocity of moneyIncome velocity of moneyReal money balancesMoney demand functionQuantity theory of moneySeigniorageNominal andreal interest ratesFisher equationFisher effectEx ante and ex postreal interest ratesShoeleather costsMenu costsReal and nominalvariablesClassical dichotomyMonetary neutrality第26页/共27页感谢您的观看。第27页/共27页