Economic Models and Graphs Study Guide

AP Macro: Economic Models and Graphs Study Guide Economic Conditions Recession LRAS SRAS Price Level Serious Inflation LRAS SRAS Price Level PL1 PL1 AD AD YF Y 1 Y1 YF Real GDP Real GDP Full Employment with Mild Inflation Price LRAS SRAS Level Stagflation SRAS2 LRAS SRAS1 Price Level PL2 PL1 SRAS Cost-Push Inflation PL1 AD YF AD Real GDP Y2 Y F Sm1 Sm2 Interest Rate Price Level Interest Rate i1 i2 i1 i2 Real GDP LRAS SRAS PL2 PL1 AD2 Dm AD1 ID Q1 Q2 Q of Money MS i i (Sm) Expansionary Monetary Policy actions by FED: reserve requirement discount rate Buy U.S. government bonds/securities (Open Market Operation) Q1 Q2 Q of Investment $ I (and C) Y1 YF RGDP AD PL GDP unemployment Short Run vs Long Run Effects Short Run: i I AD (shift right) PL and output and unemployment; net export effect: Xn Long Run eco growth: I LRAS (shift right  same as shift right of PPC curve) Sm2 Sm1 Price Level Interest Rate Interest Rate i2 i1 i2 i1 LRAS SRAS PL1 PL2 AD1 Dm Q2 Q1 MS ID Q of Money Q2 i i Effects of Expansionary Fiscal Policy: G Q1 Q of Investment $ R GDP AD PL GDP unemployment Short Run vs Long Run Effects Short Run: I AD (shift left) PL output unemployment; Net export effect: Xn Long Run Eco. growth: I LRAS (shift left  same as shift left of PPC curve) T (creates deficit; government must borrow $ to spend) Sm Price Level Interest Rate i2 i1 i2 i1 YF Y1 I (and C) Contractionary (Restrictive) Monetary Policy actions by FED: reserve requirement discount rate Sell U.S. bonds/securities (Open Market Operation) Interest Rate AD2 LRAS SRAS PL2 PL1 AD2 Dm2 ID Dm1 Q1 Q of Money AD3 AD1 Q2 Q1 Q of Investment $ Y1 YF RGDP Crowding out weakens the impact i I (and C) of expansionary fiscal policy (Crowding out effect) Short Run vs Long Run Effects of Expansionary Expansionary Fiscal Policy actions: Fiscal Policy Increase in G directly increases AD as G is a Short Run: increases AD (shift right): PL and component of AE. Decrease in T increases Yd output; unemployment. Deficit Dm i I (disposable income) and more spending (C) occurs. due to crowding out effect and Xn due to net export Overall impact is increase in AD (increase in output, effect ( I D foreign demand for bonds employment and PL). appreciation of $ Xn) Side Effect: Deficit spending increases the demand for money and pushes up interest rates. Higher Long Run Economic Growth: decrease I decreases interest rates crowd out some business investment and LRAS (shift left  same as shift left of PPC curve) interest rate sensitive spending by consumers. To the (depends on the amount of crowding out that occurs) extent that crowding out occurs, the expansionary impact of the fiscal policy will be weakened. Dm i Effects of Contractionary Fiscal Policy: G T (moves budget toward surplus; less borrowing) Sm Interest Rate PL1 PL2 i1 i2 i1 i2 LRAS SRAS Price Level Interest Rate AD1 Dm1 ID Dm2 Q of Money Q1 Dm 2 Q1 Q2 Q of Investment $ YF Y1 RGDP i i I (and C) (lessening of Crowding out effect) overall impact: AD Impact of Monetary and Fiscal Policies on Interest Rates and Business Investment Spending Policy Money Market Interest Rates Investment (I) Expansionary Monetary Policy Increase supply of money decrease increase Expansionary Fiscal Policy Increase demand for money increase decrease Contractionary Monetary Policy Decrease supply of money increase decrease Contractionary Fiscal Policy Decrease demand for money decrease increase Effect of an increase in G or decrease in T Effect of a decrease in G or increase in T Initially at Full Employment Initially at Full Employment Price Price LRAS SRAS LRAS SRAS Level Level PL2 PL1 AD2 PL1 PL2 AD1 AD1 YF Y2 AD 2 Real GDP Effect of a supply-side shock: Initially at Full Employment Price SRAS2 LRAS SRAS 1 Level PL2 Y 2 YF Real GDP Effect of an increase in G and T of same amount: * Initially at Full Employment Price LRAS SRAS Level PL2 PL1 PL1 AD2 AD Y2 YF Real GDP AD1 YF Y2 Real GDP Balanced budget increase in G and T is expansionary. * If G and T were decreased by the same amount, the effect would be contractionary ( AD Short Run vs Long Run Adjustments Short Run --- not enough time for wages to adjust to price level changes. Changes in PL, output and unemployment occur. Long Run --- enough time for wages to adjust; key effect is on PL. LRAS PL a PL1 PL2 PL3 SRAS1 SRAS2 b AD1 c Y2 YF AD2 Real GDP AD PL and output and unemployment in SR Over time lower PL and surplus of labor put downward pressure on wages. Wages lower business costs and SRAS. LR: Lower PL. (a c) If PRICES AND WAGES ARE FLEXIBLE --- NOT STICKY! Short Run vs Long Run Adjustments If PRICES AND WAGES ARE FLEXIBLE --- NOT STICKY! PL PL3 LRAS c AD PL and output and unemployment in SR b PL2 PL1 SRAS2 SRAS1 AD2 a Over time higher PL and shortage of labor put upward pressure on wages. AD1 YF Y2 Real GDP Wages raise business costs and SRAS. LR: Higher PL. 1 Nonprice Level Determinants of Aggregate Supply and Aggregate Demand C + I + G + Xn = AE AD GDP (Direct relationship between any component of AE and AD and GDP) Factors that Shift AD Curve Factors that Shift the SRAS personal taxes ( Yd) corporate income taxes ( profit exp.) government spending (exp. Fiscal) G and T by same amount . G offsets the C. Effect = 1 x G. profit expectations of businesses wealth or consumer indebtedness exports / imports $ depreciates money supply interest rates Net export effect deficit spending DLF and/or interest rates (i) Dm in personal taxes ( Yd) corporate income taxes ( profit exp.) government spending (contr. Fiscal ) G and T by same amount . G offsets the C. Effect = 1 x G. profit expectations of businesses wealth or consumer indebtedness exports / imports $ appreciates money supply interest rates Net export effect deficit spending DLF and/or interest rates (i) Dm INCREASE = SHIFT RIGHT C I G AD AD AD AD I C Xn Xn I C Xn I AD AD AD AD C I G G AD AD AD AD I C Xn Xn I C Xn I AD AD AD AD resource availability WAGES (or any other resource cost) New technology PRODUCTIVITY government regulation government subsidies business taxes (sales/excises) costs of production SRAS SRAS SRAS SRAS SRAS SRAS SRAS SRAS AD AD Supply-side shock ( energy prices) resource availability WAGES (or any other resource cost) technology PRODUCTIVITY government regulation government subsidies business taxes (sales/excises) costs of production SRAS SRAS SRAS SRAS SRAS SRAS SRAS SRAS SRAS AD AD inflationary expectations DECREASE = SHIFT LEFT wages SRAS (APPLIES TO BOTH CURVES) Reasons for the inverse relationship between the price level and the quantity of real output purchased (negative slope of the AD curve): Interest rate effect: PL Dm Wealth/Real balances effect: PL Foreign Purchases effect: PL i quantity of I and C (real output purchased) (opposite true if PL) purchasing power of wealth/real balances quantity of C exports (seem more expensive) and imports (seem cheaper) Xn Reason for the positively sloped AS curve (direct relationship between the PL and the quantity of real output produced): higher PL needed to encourage higher production. Demand-pull inflation: AD PL (too much money chasing too few goods) Cost-push inflation: SRAS PL (stagflation) AD no in PL but increases in output and employment, the economy is operating in the horizontal (Keynesian) portion of its AS curve. High unemployment allows businesses to hire more workers without putting pressure on wages or prices. If AD PL but no in output and employment, economy is operating in the vertical (classical) range of its AS curve. Increased demand puts pressure on prices only as economy is operating at its maximum of output and employment. If Key Idea: Interest Rates and Bond Prices Vary Inversely Effect of Expansionary Monetary Policy Fed buys bonds Money Market Bond Market Bond Price SM1 S M2 Interest Rate SB P2 P1 i1 DB2 i2 DB1 DM Q1 Q2 money supply Q of Bonds Quantity $ interest rates Bond Prices Effect of Contractionary Monetary FED sells bonds Money Market Bond Market Bond Price SM2 S M1 Interest Rate Yields SB1 SB2 P1 P2 I2 I1 DB DM Q2 Q1 money supply Q of Bonds Quantity $ interest rates Bond Prices Yields Effect of Expansionary Fiscal Policy Treasury sells bonds to fund deficit and bondholders sell existing bonds because the new issues of bonds have higher interest rates than existing issues. Loanable Funds Market Interest Rate i2 Bond Market Bond Price SLF SB1 SB2 i1 DLF2 P1 P2 DLF1 Q1 Exp. FP deficits DB Q of LF DLF i Q of Bonds Bond Prices Yields Effect of Contractionary Fiscal Policy Treasury bond sales due to surpluses and bondholders do not want to sell existing bonds because the new issues of bonds will have lower interest rates than existing issues. Loanable Funds Market Interest Rate I1 Bond Market Bond Price SLF SB2 S B1 P2 P1 I2 DLF1 DLF2 DB Q of LF Contractionary FP surpluses DLF Q of Bonds i Bond Prices Yields Conclusion: Interest Rates and Bond Prices Vary Inversely Changes in the domestic money markets: Supply of Money is fixed by the FED (vertical) ---- SM changes as a result of FED Actions Fed Action: (Monetary Policy Tools) Inflation reserve requirement discount rate Open Market Operation: Sell U.S. Bonds Recession reserve requirement discount rate Open Market Operation: Buy U.S. Bonds SM Interest Rates Ig and C AD Fiscal Policy affects the Demand for Money (money market) and/or the Demand for Loanable Funds (loanable funds market) Expansionary Fiscal Policy increases Dm in money market. Why: 1) Deficit spending increases government demand for money. (Also, DLF in loanable funds market); 2) increases in AD resulting from expansionary fiscal policy increase the price level and GDP. A rising nominal GDP increases demand for money to purchase the output (Dm in Money Market). In both the money market and the loanable funds market, the demand curves shift right and interest rates rise --- possibly creating a crowding-out effect ( I). Contractionary Fiscal Policy Dm in the money market. 1) a reduction in deficit spending or surpluses decrease government demand for money. In the loanable funds market, government needs to borrow less; therefore, DLF. 2) decreasing price level and nominal GDP result in less money demanded to purchase output, thus Dm in the money market. In both markets, contractionary fiscal policy shifts the demand curve to the left and interest rates fall  possibly encouraging business investment spending (lessening the crowding-out effect). Money, Banking and The FED Key Terms: Money Barter System Functions of Money M1 M2 M3 Transactions Demand Asset Demand (Speculative) MV = PQ M V PQ Fractional Reserve System Actual reserves Required Reserves Reserve Ratio or Reserve Requirement Excess Reserves Deposit Multiplier Loans Demand Deposit The FED (Federal Reserve System) Anything acceptable as a medium of exchange that is portable, durable, stable in value, and divisible. Requires a double coincidence of wants Medium of exchange; store of value; unit of account or standard of value Most narrow definition of money; consists of currency and checkable deposits M1 + small time deposits and noncheckable savings deposits M2 + large time deposits and institutional money market funds Money demanded for transactions; insensitive to interest rates (perfectly inelastic); changes directly with nominal GDP. Demand for money as a money balance ---varies inversely with interest rates interest rates opportunity cost of holding money, so people reduce money balances; a in interest rates the opportunity cost of holding money so people hold more. Negatively sloped. Equation of Exchange Money Supply Velocity of money --- number of times $ is spent Nominal GDP System in which banks loan out a portion of their actual reserves (keep some in bank vault or on deposit at the FED, loan out the remainder). Money held by the bank (money in bank reserves is not counted in circulation) Percentage (actual $) of deposits banks must keep in bank vault or on deposit at the FED Percent (%) of deposits FED requires banks to keep in bank vault or on deposit at the FED. Reserves in excess of required reserves; amount available for loans. Actual reserves  required reserves = excess reserves. The multiple by which the banking system can create money; = 1/RR Means by which banks can create money. Checkable deposit Independent regulatory agency of the U.S. governmentour nations central bank; controls the money supply through monetary policy, provides services to member banks; supervises the banking system; etc. Banks and Money Creation: Key Principles: A single bank can create money (through loans) by the amount of its excess reserves The banking system as a whole can create money by a multiple (deposit or money multiplier) of the initial excess reserves. Reserves lost to one bank are gained by other banks in the system (under the assumptions below) Key Assumptions for banking system to create its maximum potential: Banks loan out all of their excess reserves Loans are redeposited in checking accounts rather than taken in cash. Initial Deposit New or Existing $ Bank Reserves Immediate Change in MS cash Existing Increase (amount of deposit) No; changes M1 composition from cash to currency. FED Purchase of a bond New Increase (amount of deposit) Yes; money coming out of from public FED is new $ in circulation Bank Purchase of a bond New Increase (amount of deposit) Yes; money coming out of from the public bank reserves is new $ Buried Treasure New (has been out of Increase (amount of deposit) Yes. circulation) If initial deposit is new money, the MS increases immediately by the amount of the deposit in the bank. Money Creation Process (Assume 10% reserve requirement) $1000 FED purchase of Bonds from the Public (Deposited in Checking Account) $1000 in cash deposited in checking account No immediate Change in MS Either deposit would increase actual reserves by $1000. Assets Reserves $1000 Immediate Liabilities Checking Deposits MS of $1000 $1000 Required Reserves = $100 (.10 x $1000 deposit) Single Bank: Amount of money single bank can create (loan out) = ER Actual Reserves  Required Reserves = Excess Reserves $1000 - $100 = $900 in Excess Reserves Banking System: Can create money by a MULTIPLE of its initial EXCESS RESERVES Deposit Multiplier = 1/RR = 1/.10 = 10 System New $ = Deposit Multiplier x Initial Excess Reserves 10 x $900 = $9000 Total Change in the Money Supply as a Result of the Deposit: Initial Deposit (if new) + Banking System Created Money = Total Change in MS $1000 + $9000 = $10,000 If initial deposit is not new money, the total change in the MS is only the new money created by the banking system = $9000. Additional key terms and things to know: FED Funds Rate --- interest rate banks charge each other for temporary (overnight) loans. The FED usually targets this interest rate with its open market operations. Although each tool of the FED theoretically can work to increase or decrease the money supply, the most used tool of the FED is OPEN MARKET OPERATIONS (buying or selling government securities on the open market). Changes in the reserve requirement are not frequently made because they can be destabilizing. The Discount Rate is relatively insignificant because banks are more likely to borrow from each other and pay the FED funds rate rather than borrow from the FED (lender of last resort). Discount rate changes usually simply act as a signal of the direction the FED is taking with monetary policy: expansionary ( discount rate) or contractionary ( discount rate). Elasticity and Macroeconomics Elasticity: degree of responsiveness of quantity demanded or quantity supplied to a change in price; in macro it is often referred to as a sensitivity (relatively elastic) or lack of sensitivity (relatively inelastic) of quantity to a change in interest rates, PL, prices, etc. Macro applications of elasticity are found below: Money Market Supply Curve i Loanable Funds Supply Curve i SLF SM QLF QM SM in the money market is fixed by the FED; therefore, it is perfectly inelastic (vertical) indicating a lack of sensitivity of Q M to interest rate changes. Interest rate changes do not change the quantity of money supplied; however, changes in the SM do change interest rates. SLF in the loanable funds market reflects a sensitivity between interest rate changes and the quantity of loanable funds supplied. At higher interest rates, there is more saving to provide a pool of loanable funds; at lower interest rates, saving declines. Therefore, the quantity of loanable funds varies directly with interest rates making the SLF curve positively sloped. It is important to make the above distinction in supply curves when drawing graphs of the markets above. Failure to draw the SM curve as a vertical line and the SLF curve as a positively sloped (upward sloping) line will cost you points on the free response. AS Curve in the Classical View AS Curve in the Keynesian View PL AS PL AS AD YF Y GDPR The classical school of thought depicts the AS curve as vertical (output/employment are not sensitive to price level changes  perfectly inelastic curve) at full employment, reflecting the belief that changes in AD cause only temporary instability and the economy adjusts back to full employment through price/wage flexibility. AD has its greatest effect on PL --- not output and employment, and supply creates its own demand (Says Law). LRAS Curve PL Y GDPR Keynesians view the AS curve as horizontal (perfectly elastic) at output levels below full employment. This reflects their belief that prices and wages are inflexible downward and that increases in AD at less than full employment do not put upward pressure on the price level due to large numbers of unemployed workers. Changes in AD have their greatest effects on output and employment, not PL. Short-Run Phillips Curve Inflation rate LRAS AD AD AD Long-run Phillips Curve Inflation rate LRPC PC YF GDP R The LRAS is vertical (perfectly inelastic) at YF representing a maximum productive potential at any point in time; in the LR, only the PL chan ges. Unemployment Rate The PC reflects a trade-off between inflation and unemployment  PL unemployment Unemployment Rate The LRPC (vertical) reflects the same point as the LRAS curve  no trade-off exists between PL and output and unemployment in the LR --- only the PL changes. Interest Rate Sensitivity and Money Demand Interest rates Interest Rate Sensitivity and Investment Demand Interest rates i1 DmA DIA i2 DmB DIB Quantity of $ An Sm results in a small change in interest rates if the Dm is more elastic (DmA) and a larger change in interest rates if the Dm is more inelastic (DmB). If investment demand is sensitive to interest rates, the change in Ig, AD, output, etc., will be greater the more inelastic the money demand curve. QI1 QI2 QI3 Quantity of I$ A change in interest rates from i 1 to i2 results in a much larger increase (Q1 to Q3) in business investment spending (I) if the Investment Demand curve is more elastic (D IA) than if the Investment Demand curve is more inelastic (less sensitivity to interest rate changes results in Q I1 to QI2). Production Possibilities Curves and Connections to the AD-AS Model. PPC represents potential (maximum combinations of output given resources/technology) to produce output. (LRAS in the AD-AS model.) Points on curve are possible combinations of output if all resources are used fully/efficiently. (LRAS at YF in the AD-AS model) Movement on the curve results in trade-offs and opportunity costs --- to produce more of one/the other must be given up. Opportunity cost --- what is given up when making a choice; the most valued alternative not taken (capital goods vs. consumer goods; guns vs. butter). Points under (inside or to the left) the PPC represent less than full employment (unemployment) or inefficient use of resources (underemployment). Correlates to recession in the AD-AS model. Points outside (to the right of or outside) the PPC are not possible given resources/technology available. (Inflationary or overheated economy in the AD-AS model --- not sustainable over time  adjusts back to YF). Shift right of the PPC curve (add resources  land/labor/capital; improve productivity with education/training/technology; improve technology). (Shift right of the LRAS curve for same reasons). Economy has greater potential to produce --- real economic growth. Shift left of the PPC curve ( resources, technology, productivity). Shift left of the LRAS in the ADAS model. Good A Capital Goods Consumer Goods Good B PL Capital Goods LRAS1 LRAS2 YF1 YF2 GDPR Consumer Goods PL LRAS2 LRAS1 YF2 YF1 GDPR Short run- but not the long-run: Long run economic growth depends on: Temporary changes in production costs (OPEC) Supply of labor Inflationary expectations Supply of capital Level of technology Factors that can influence the above: Saving --- saving supplies loanable funds for business investment in capital (I) Research --- funds for research provide a basis for technological development Comparative advantage in trade - encourages more efficient use of global resources Education/training --- improves the quality of labor resources and productivity Business taxes that actually dampen profit expectations and investment in capital Business investment spending (I) increases AD in the short run as purchases of capital are made; however, after new plant/equipment is operational (the long-run) the additional capital changes the LRAS. If asked to determine the impact of government policies on long-run economic growth, determine the impact of the policy on business investment spending (I). Key Concepts related to Fiscal Policy Fiscal Policy deficit surplus balanced budget National debt Automatic stabilizer discretionary Crowding-out effect Actions taken by Congress and the President to stabilize the economy with changes in G and/or T. Budget shortfall; occurs when expenditures > revenues Occurs when expenditures are < revenues Expenditures = Revenues Accumulated deficits over time; deficits are funded by the selling of government securities. Automatically moves the budget toward a deficit (if the economy is moving toward a recession) or a surplus (if the economy is expanding) without action taken by Congress or the President. Nondiscretionary --- system is already in place and works automatically without action by Congress. Ex. Progressive tax system and unemployment compensation Requires action by Congress or the President ---- changes in G or T. Decreases in business investment spending resulting from high interest rates due to government deficit spending (increases in government demand for loanable funds / increases in demand for money drive up interest rates and discourage business investment spending) The Phillips Curve Key Idea: A tradeoff exists between inflation and unemployment in the short run. Inflation Rate Inflation Rate PC PC Unemployment Rate Unemployment Rate An increase in AD in the AD-AS model results in an increase in PL and a decrease in unemployment as shown by movement up the SR Phillips curve. A decrease in AD in the AD-AS model results in a decrease in PL and an increase in unemployment as shown by movement down the SR Phillips curve. Inflation Rate Inflation Rate PC2 PC1 Unemployment Rate A decrease in SRAS in the AD-AS model results in an increase in PL and an increase in unemployment (stagflation) as shown by a shift right in the SR Phillips curve. The shift right of the Phillips curve indicates that a specified rate of inflation now is associated with a higher rate of unemployment. Inflation Rate The Long Run Phillips Curve LRPC Unemployment Rate PC1 PC2 Unemployment Rate An increase in SRAS in the AD-AS model results in a decrease in PL and a decrease in unemployment as shown by a shift left in the SR Phillips curve. The shift left of the Phillips curve indicates that a specified rate of inflation now is associated with a lower rate of unemployment. The LRPC can be associated with LR adjustments in the AD-AS model assuming price-wage flexibility and no government intervention. Increases and decreases in AD in the LR affect only the price level and not output and unemployment. Policy Mixes Policy Interaction Expansionary Monetary and Fiscal Contractionary Monetary and Fiscal Expansionary Monetary/Contractionary Fiscal Contractionary Monetary / Expansionary Fiscal PL Output Unemployment ? ? ? ? ? ? Interest Rates ? ? Explanations: Expansionary monetary and fiscal policies have different effects on interest rates. Monetary policy increases the money supply and lowers interest rates. Fiscal policy increases the demand for loanable funds (due to deficit spending) and drives up interest rates. The actual impact on interest rates depends on the relative strength of each policy. Contractionary monetary policy decreases the money supply and increases interest rates. A contractionary fiscal policy lessens deficit spending and moves the budget toward a surplus; therefore, government demand for loanable funds decreases and interest rates fall. The actual impact would depends on the relative strength of each policy. Expansionary monetary ( AD) and contractionary fiscal ( AD) policies move price level, output, and unemployment in opposite directions, thus the actual change in each would depend on the relative strength of each policy action. Both policies, however, decrease interest rates. Expansionary monetary policy actions increase the money supply and reduce interest rates. Contractionary fiscal policy (surpluses) reduces government demand for loanable funds, also putting downward pressure on interest rates. Contractionary monetary ( AD) and expansionary fiscal ( AD) policies move price level, output, and unemployment in opposite directions, thus the actual change in each depends on the relative strength of each policy action. Both policies, however, increase interest rates. Contractionary monetary policy decreases the money supply and increases interest rates. Expansionary fiscal policies increase government demand for loanable funds and drive up interest rates. Effects of Government Policies on Interest Rates, Xn, Business Investment and LR Economic Growth Policy Expansionary Fiscal Contractionary Fiscal Expansionary Monetary Contractionary Monetary Interest Rates Net Exports Business Investment (I) Long Run Economic Growth Factors to consider when explaining the above: Fiscal policy affects the demand for money and/or demand for loanable funds; monetary policy affects the supply of money. Changes in the supply and demand for money (and supply and demand for loanable funds) affect interest rates Net export effect of changes in interest rates Crowding out effect of government deficit spending Changes in capital stock (business investment decisions) and LR economic growth Changes in business investment spending affect AD in the short run, but AS in the long run. Measurement of Economic Performance GDP: measures OUTPUT of goods and services GDP (Gross Domestic Product) Total value of all final goods and services produced in the United States in a year Includes: all production or income earned within the U.S. by U.S. and foreign producers. Excludes: production outside of the U.S., even by Americans. GNP (Gross National Product) Total value of all final goods and services produced by Americans in a year. Includes: production or income earned by Americans anywhere in the world. Excludes: production by nonAmericans, even in the U.S. Two approaches to measuring GDP: Expenditures or Income Expenditures for G&S produced = Income generated from production of G&S Expenditures Approach: C + Ig + G + Xn (Expenditures for output Income Approach: Add all the income (R,W,I,P) generated from the production of final output plus indirect business taxes and depreciation charges. National Income: sum of rent, wages, interest and profits earned by Americans (excludes net foreign factor income) Disposable Income (Yd): personal income minus taxes (income that can be spent or saved; Yd = C +S What is included/excluded in GDP calculation: Included Excluded Final Goods and Services Intermediate Goods (avoid double counting) Income earned (Rent, wages, interest, profit) Transfer (public and private) Payments (social security, unemployment compensation; personal money gifts) Interest payments on corporate bonds (part of income Purchases of stocks and bonds (purely financial earned) transactions) Current production of final goods Second-hand sales (avoid double counting) Unsold output (business inventories)  counted as Ig Nonmarket transactions (legal and illegal non-recorded transactions --- illegal drugs, prostitution, doing your own housework or repair jobs, babysitting, growing your own vegetables for personal consumption (etc.) Leisure time --- understates GDP Quality improvements --- understate GDP Underground economy ---- understates GDP Gross National Garbage --- overstates GDP Expenditures approach to GDP: C + Ig + G + Xn C = Consumption = purchases of final durable and nondurable goods and services by consumer households. Ig = Gross Private Domestic Investment = purchases (spending) by businesses of capital goods, all construction and changes in inventories (unsold output) Increases in inventories are added to GDP (represent output currently produced) Decreases in inventories are subtracted from GDP (selling goods produced in previous years) Gross Investment  Depreciation = Net Investment o Positive net investment = increases in capital stock = shift right in PPC o Negative net investment = decreases in capital stock = shift left in PPC o Zero net investment = stable capital stock = static economy (unchanging in productive capacity) G = government expenditures for goods and services (missiles, tanks, etc.) Xn = Net Exports (exports  imports) [X  M] GDP and price level changes: Nominal GDP Unadjusted for price level changes GDP in current dollars PXQ Less accurate measure of output because price level changes are included. Real GDP Adjusted for price level changes GDP in constant dollars (Nominal GDP / GDP Price Index ) x 100 GDP Price Index = GDP Deflator More accurate measure of output because price level changes have been adjusted to reflect base (reference) year prices. If the price level is rising, nominal GDP may increase, but output may be increasing or decreasing or remaining stable. Changes in the price level: MEASURED BY PRICE INDEX Price level changes (changes in the rate of inflation) are measured by price indexes. A price index relates expenditures of a group of goods (market basket) in a given year to expenditures for the same group of goods in a base (reference) year. Price indexes are used to adjust nominal GDP and nominal income to obtain real GDP or real income. Price Index # = [Expenditures in Given Year / Expenditures in Base Year] x 100. Real GDP = [ Nominal GDP / GDP price index] x 100 Real Income = [Nominal Income / Consumer Price Index] x 100 Change in Price Level = [(b-a)/a] x 100 = [(Change in Price Index/Beginning Price Index) x 100] Three Key Price Indexes: Consumer Price Index (CPI) A weighted index that measures expenditures for a specific market basket of goods purchased by a typical urban consumer; often used as a standard for labor contracts and COLAs (cost of living adjustments in social security, etc.) GDP Price Index (Deflator) A broader index than the CPI, it includes goods purchased by each sector of the economy: C, I, G, Xn. Used to adjust nominal GDP to obtain real GDP. Wholesale Price Index Measures changes in wholesale prices (producer/distributor to retailer); reflects changes in business costs due to price level changes. Nominal vs. Real Income: Nominal Income --- money income  actual dollar amount of income (unadjusted for price level changes) Real Income ---- purchasing power of income  what a given income can comparatively purchase in goods and services; adjusted for price level changes. Change in Real Income = Change in Nominal Income  Rate of Inflation Example: If nominal income increases by 5% and inflation increases by 8%, real income will fall by 3%. If nominal income increases by 10% and the rate of inflation is 6%, real income will rise by 4%. Nominal interest rate  percentage increase in money the borrower must pay the lender for a loan. For example, if the nominal interest rate is 5% on a $1000 loan, the borrower must pay the lender $50 or 5% of the loan. Real interest rate  the percentage increase in purchasing power the borrower must pay the lender for a loan. For example, if the nominal interest rate is 5% and the rate of inflation is 6%, the $50 paid to the lender as interest on a $1000 loan provides the lender with less purchasing power (-1%) when repaid. Unanticipated inflation: Nominal interest rate  inflation rate = real interest rate received Anticipated inflation (Fisher Effect): Nominal interest rate = Expected interest rate + inflation premium Short Run vs. Long Run Changes in Nominal and Real Interest Rates Assume an increase in the Supply of Money (Sm) by the FED: Short Run: Long Run: Sm Sm in both nominal and real interest rates in both nominal and real interest rates Sm AD PL creditors to add an inflation premium to expected interest rates nominal interest rate and a return of real interest rates to the LR equilibrium. (Fisher Effect) Sm AD PL nominal interest rates; real interest rates return to the LR equilibrium Who is hurt/helped (loses/gains) by unanticipated inflation: Fixed income recipients hurt Purchasing power falls as PL rises Savers hurt Purchasing power of saving falls as PL rises debtors helped $ paid back is worth less in purchasing power than $ borrowed creditors hurt $ loaned is worth less in purchasing power than $ paid back Flexible income recipient uncertain Depends on if the nominal income exceeds the rate of inflation A buyer who pays fixed payments helped Rising inflation will decrease the purchasing power of the money paid; recipient of payment is hurt. Measurement of Unemployment: Labor Force Employed + Unemployed Employed Worked for pay in the last week Unemployed Looking for work in the last month Discouraged Worker Given up looking for work (out of the labor force) Part-time workers Counted as full time; underemployed understate the unemployment rate Labor Force Participation Rate Labor Force as a percent of the population [(Labor force/population) x 100] Unemployment Rate (# of unemployed / labor force) x 100 Types of Unemployment: Frictional Structural In-between jobs; looking for first job (temporary) Workers skills are no longer in demand or obsolete: results from automation, foreign competition, changes in demand for products; can be lengthy and may require retraining or relocation to find a new job. Cyclical Caused by insufficient AD; associated with a recession; Actual unemployment is greater than the natural rate of unemployment; associated with a GDP gap Natural Rate of Unemployment Sum of frictional and structural unemployment; exists at YF (full employment); approximately 4-6%; associated with potential output GDP gap gap between actual and potential GDP; lost output; occurs when the economy falls below the full employment level of output (YF) Okuns Law Each 1% cyclical unemployment = 2% GDP Gap Potential output Output that could be produced if at full employment (YF) Business cycle: ups and downs in business activity; 4 phases: recovery/expansion; peak/boom; contraction; and trough. Phases are not equal in duration. Scarcity exists. Capital Goods Consumer Goods Trade-off Opportunity Cost Factors of Production Factor Payments The Circular Flow Model and Other Basic Concepts Unlimited Wants vs. Limited Resources Goods used to make other goods; machinery, equipment, factory, etc. Goods for immediate consumption To get something, you have to give up something What is given up when making a choice; the most valued alternative not taken; = sum of explicit and implicit (hidden) costs Land (natural resources); labor; capital (machinery, equipment); entrepreneurship Income or return for L, L,C, E: rent, wages, interest, profit (RWIP) Payments for Goods and Services Goods and Services Product Market Consumer Households Resource Marke t Business Firms Factors of Production: L,L, C, E Payments for Factors of Production: RWIP The Simple Circular Flow Model (diagram above): Consumers make expenditures for goods and services supplied by business firms in the product market. Consumers earn income by selling their factors of production in the resource market. Payment for factors of production in the resource market becomes income to consumers who make expenditures in the product market. Output can be measured by the expenditures for the goods and services or the income generated from the production of the goods and services. Government can influence the circular flow model through taxes, subsidies, transfer payments, factor payments for land, labor, capital; and provision of public goods and services. Keynesian AE = C+I +G+Xn Demand-siders AE is the main determinant of output and unemployment AS curve: horizontal Prices/wages are inflexible downward Government action is needed to fix the economy (monetary and fiscal policies) No inherent mechanisms exist to maintain full employment The economy can be at equilibrium at less than full employment Instability can be lengthy in duration Economic Schools of Thought Classical Supply-siders Says Law: supply creates its own demand AS curve: vertical at YF Price/wages are flexible Laissez-faire policy for government Instability is temporary The economy has inherent mechanisms that can maintain full employment levels of output Changes in AD are caused by changes in the MS and mainly have their impact on PL. Rational Expectations Theory Main determinant of economic activity is AS Government should encourage people to work hard, save, invest Cut taxes and government regulations to increase AS Laffer Curve (Tax Rates vs. Revenues) Informed expectations negate government policies; therefore, government actions are ineffective and destabilizing Economy adjusts immediately to changes Phillips Curve is vertical (no trade-off) Monetarists Neoclassical Main determinant of economic activity is money supply MV = PQ Velocity is stable The MS has a direct impact on nominal GDP Do not fine-tune economy with MS Follow the Money Rule: set the MS on a stable growth page of 3-5 % (rate of growth in GDP) Keynesian Theory and the Multiplier Effect Key ideas: Aggregate Expenditures (C+I+G+Xn) are the main determinant of output, employment and price level. Income (Yd) is the main determinant of C and S. C and S vary directly with income. Key Terms: Average Propensity to Consume (APC) Average Propensity to Save (APS) Marginal Propensity to Consume (MPC) Marginal Propensity to Save (MPS) MPS + MPC = 1 APS +APC = 1 Multiplier Effect Spending Multiplier Key Multiplier formula: Unplanned investment Planned investment If AE> GDP, then: If AE < GDP, then: If AE = GDP, then: Inflationary Gap: Recessionary Gap: GDP gap At equilibrium: Balanced budget Multiplier = G and T by same amount G and T by the same amount Fraction of income that is spent; C/Yd; varies inversely with Yd Fraction of income that is saved; S/Yd, varies directly with Yd Fraction of any change in income that is spent; C/ Yd Fraction of any change in income that is saved; S/ Yd Small changes in AE give rise to much larger changes in GDP and Yd 1/MPS or 1/1-MPC or GDPe/ AE AE x Multiplier = GDPe Changes in business inventories Business spending on capital goods; Ip = Saving at GDPe Inventories fall and production increases Inventories rise and production decreases Equilibrium in the Keynesian AE model Amount by which spending exceeds the full employment level of output; Amount by which spending must be decreased to return to YF. Amount by which spending falls short of the full employment level of output; Amount by which spending must be increased to close a GDP gap and return to full employment. Amount by which actual output falls short of potential (YF) output. GDPe = AE; Ip = S; Iunplanned = to 0. 1 times the change in G Expansionary by the amount of G Contractionary by the amount of G Multiplier Effect: a change in AE change in Yd change in C and S change in Yd by the amount of the change in C more spending more income spending income . . . If G changes by 50 billion and the MPS is = .20, then the change in GDPe = $250 billion [ AE x M = GDP] Keynesian Expenditures Model (You do not have to draw this model for the free response, but you may have to interpret it on a multiple choice question). 450 AE If a C+I+G+Xn 100 AE of 50 gives rise to a GDPe of 200, then the multiplier must be 4 and the MPS = .25 and the MPC = .75. AE x Multiplier = GDPe 50 x 4 = 200 AE of 50 50 500 700 GDP/Yd If 700 represented YF, then a GDP gap of 200 would exist requiring an G of 50 to close the gap. GDP of 200 A decrease in Taxes of $50 billion has a smaller impact on the economy as an increase in G of $50 billion. The decrease in taxes first changes Yd which then changes C and S. The change in spending C x the multiplier = the multiple effect of the change in taxes. Foreign (Currency) Exchange Markets (International Money Markets) Foreign Demand for U.S. goods/services/investments Demand for U.S. dollar and Market for U.S. Dollar Price of $ in foreign currency Supply of Foreign Currency. Market for Foreign Currency Price of foreign currency in dollars S$ S FC1 SFC2 D$2 DFC D$1 Q1 Q2 Q of Dollars Q1 Q2 Price ; U.S. dollar appreciates Price ; foreign currency depreciates Foreign Demand for U.S. goods/services/investments Demand for U.S. dollar and Market for U.S. Dollar Price of $ in foreign currency Q of For. Curr. Supply of Foreign Currency. Market for Foreign Currency Price of foreign currency in dollars S$ S FC2 SFC1 D$1 D$2 Q2 Q1 DFC Q of Dollars Price ; U.S. dollar depreciates Q2 Q1 Price ; foreign currency appreciates U.S. Demand for foreign. goods/services/investments Demand for Foreign Currency and Market for U.S. Dollar Price of $ in foreign currency Q of For. Curr. Supply of U.S. dollar Market for Foreign Currency S$1 S $2 Price of foreign currency in dollars S FC D FC2 D$ Q1 Q2 Q of Dollars Price ; U.S. dollar depreciates DFC1 Q1 Q2 Q of For. Curr. Price ; foreign currency appreciates If the dollar appreciates, the foreign currency depreciates. If the dollar depreciates, the foreign currency appreciates. U.S. Demand for foreign. goods/services/investments Demand for Foreign Currency and Market for U.S. Dollar Price of $ in foreign currency Supply of U.S. dollar Market for Foreign Currency S$2 S $1 Price of foreign currency in dollars S FC D FC1 D$ Q2 Q1 DFC2 Q of Dollars Q2 Q1 Price ; U.S. dollar appreciates Dollar Value Relative Price of U.S. Imports (M) Explanation Appreciate cheaper U.S. gives up fewer $ to purchase foreign goods Depreciate more expensive U.S. gives up more $ to purchase foreign goods Event Higher price level in the U.S. Higher interest rates in U.S. Higher interest rates in foreign nation Higher foreign incomes Increased tourism in U.S. Increased tourism abroad by Americans U.S. Dollar demand demand supply demand demand supply Q of For. Curr. Price ; foreign currency depreciates M Relative Price of U.S. Exports (X) more expensive cheaper Dollar Value depreciates appreciates depreciates appreciates appreciates depreciates Explanation X Xn Foreign buyers give up more of their currency to buy American goods. Foreign buyers give up less of their currency to buy American goods. Foreign Currency supply supply demand supply supply demand Value of For. Cur. appreciates depreciates appreciates depreciates depreciates appreciates Xn Net export Effect ---- changes in interest rates: Higher U.S. interest rates attract foreign investors seeking a higher rate of return on interest-bearing investments (bonds). An inflow of foreign capital to the U.S. results from foreign purchases of U.S. bonds. demand for U.S. bonds foreign demand for U.S. dollars and an supply of foreign currency The dollar appreciates and the foreign currency depreciates foreign goods seem cheaper to American buyers (Americans give up fewer dollars for each unit of foreign currency) U.S. imports . A depreciation of foreign currency U.S. goods seem relatively more expensive (foreign buyers must give up more currency for the U.S. dollar); U.S. exports . Xn decreases. U.S. interest rates demand for U.S. bonds by foreign investors (why: lower rate of return on investment) demand for U.S. dollar and supply of foreign currency. Foreign currency appreciates relative to dollar / dollar depreciates U.S. exports seem cheaper / U.S. imports seem more expensive Xn Higher U.S. interest rates ----- financial capital flows to the U.S. from foreign nations (inflow of capital) Higher foreign interest rates ---- financial capital flows from the U.S. to foreign nations (outflow of capital) Balance of Payments Balance of Payments: record of all payments made and received between two nations. Must sum to zero. + (credit: foreign payment to the U.S. --- a credit means the U.S. earn supplies of foreign currencies) - (debit: U.S. payment to a foreign nation --- a debit means the U.S. uses its reserves of foreign currency to make a purchase; foreign nations gain reserves of U.S. dollars) Deficit in the Balance of Payments --- U.S. is paying out more for foreign goods, services, investments etc., than it is receiving. U.S. is not earning enough foreign reserves to cover our purchases from foreign nations. Surplus in the Balance of Payments --- Payments to the U.S are greater than U.S. payments to foreign nations. U.S. is earning more in foreign currencies than it is using to purchase foreign goods, services, investments. Current Account Capital Account Official Reserves Balance on Goods (exports/imports of goods and services) Balance on Services (exports/imports of services) Balance on Goods and Services (balance of trade) Net Transfer Payments Net Dividends and Interest (net returns on previous investments) U.S. purchases of foreign real and financial assets (outpayments/outflows of capital) + reserves: if deficit in balance of payments (official reserves of the FED are drawn down to balance the shortfall in foreign currency) Balance on the Current Account Balance on the Capital Account Foreign purchases of U.S.real and financial assets (inpayments / inflows of capital) - reserves: if surplus in balance of payments (official reserves of the FED increase to due to the excess in foreign currency) Official reserves held by central banks (the FED in the U.S.) are the means by which the capital and current accounts are balanced to zero. Effects of Tariffs, Quotas and Subsidies in International Trade U.S. tariffs and quotas the domestic supply of foreign goods and their prices. In the short-run, domestic production due to the higher prices. Subsidies the supply of goods and their price in the short-run. Effect of a Tariff Effect of a Quota Effect of a Subsidy SD SD P P SD +F w /T SD +F PD PT SD no subsidy SD +F w /Q SD +F PD PQ PF+D PF+D Domestic Q without T QT QD+F no tariff Q Domestic Q after T Total Q with Tariff U.S. tariffs reduce the total world trade quantity and increase the market price. Domestic producers will produce more at higher price but consumers will still pay more and have less Q available after the tariff because the tariff restricts foreign supply available to U.S. consumers. SD +F no sub SD +F PD P with subsidy PS D D Q D QD P QD QD Domestic Q without Q QQ QD+F Domestic Q after Q no Quota D Q Total Q with Quota U.S. quotas reduce the total world trade quantity and increase the market price. Domestic producers will produce more at higher price, but overall price is higher/Q less for consumers because quota foreign Supply available to U.S. consumers. Q Q with subsidy Q Total Q without subsidy Total Q with subsidy Subsidies increase the total world trade quantity and decrease its price. The price is less for consumers and quantity is greater. Effect on domestic production depends on if subsidies are domestic ( due to lower production costs) or foreign ( domestic production due to lower costs of foreign competition and lower market price). Absolute and Comparative Advantage and International Trade Absolute advantage (AA): Input problem: Output problem: can produce more with given resources nation that produces the same amount with fewer resources (i.e., less hours) nation that produces the greatest quantity of any product given the resources A nation can have an absolute advantage in the production of both products or a comparative disadvantage in both products, but a nation can only have a comparative advantage in 1 product. Even if a nation has an absolute advantage in both products, it is more efficient and output gains can be achieved if the nation specializes and trades according to comparative advantage. When this occurs, the PPCs of each nation are extended by the trading possibilities. Comparative advantage (CA): can produce more at a LOWER domestic OPPORTUNITY COST (give up less to produce)  relatively more efficient; COMPARATIVE ADVANTAGE IS THE BASIS FOR SPECIALIZATION AND TRADE. If all nations specialize according to comparative advantage, there will be a more efficient use of global resources and gains from trade (more can be produced given the resources) To determine comparative advantage: Output problem (data in terms of products produced) Set up the problem (see class handout for more details) Identify production maximums for each nation Reduce ratio of maximum production in each nation (reduce within nations not between nations) Determine domestic opportunity cost of one unit of each product within each nation (what is given up to produce 1 unit) Compare (nation to nation) opportunity costs of producing each product; LOWEST OC should specialize. Wheat 20 Nation A 16 Nation B 8 20 Computers Nations A B Wheat 20 1 (1C) 16 2 (1/2 C) Computers 20 1 (1W) 8 1 (2W) Nation A has the CA in Computers (gives up 1W to produce 1 computer as compared to 2W in Nation B). Nation B has the CA in Wheat (gives up ½ C to produce 1 wheat as compared to 1 C given up by nation A). Therefore, Nation A should export computers and import wheat; Nation B should export wheat and import computers. Even though Nation A has the absolute advantage in both, it should specialize according to CA and trade with B. Gains from trade: Total the output of each product before specialization and trade. Compare to output of each product AFTER specialization (maximum output of product). Terms of trade: look at original reduced ratios. The range of the terms of trade is set by those ratios. (See output problem above) Wheat Computers Nation A 1W 1C Possible term of trade = 1C = 1.5 W (must fall between) Nation B 2W 1C Range of Trading Terms : 1W < 1 computer < 2 W beneficial to both nations Explanation: If trade occurs between the two nations at 1 Computer = 1.5 Wheat, both nations will benefit from the terms of trade. Prior to specialization, Nation A domestically gave up 1 computer to produce 1 unit of wheat. By specializing in computers, it can now get 1.5W from Nation B for 1 computer, thus increasing the amount of wheat received per computer given up. Prior to specialization and trade, Nation B had to give up 2 units of wheat to domestically produce one computer. By specializing in wheat production, it can now trade 1.5 units of wheat for 1 computer from Nation A, thus giving up less wheat to get 1 computer. SPECIALIZATION AND TRADE ACCORDING TO COMPARATIVE ADVANTAGE INCREASES OUTPUT AND USES GLOBAL RESOURCES MORE EFFICIENTLY, THUS INCREASING THE TRADING POSSIBILITIES of EACH NATION. Input problem (data in terms of resources needed to produce a unit of product  labor hours, acres, etc) Determine absolute advantage first (Do not swap data for AA )  LEAST AMOUNT OF RESOURCES USED . To determine comparative advantage, do either of the following to convert to an output problem: o Swap data (i.e. U.S. can produce cars in 6 hours and computers in 2 hours  swap: cars : 2, computers: 6 . Swap puts problem into output. Follow output procedures. EASY METHOD o Alternative method: seek a common multiple of all the numbers and divide the inputs into that common multiple. Result: output of each product. Follow output procedures.