Copyright © 2010 Pearson Education. All rights reserved. Chapter 19 The Demand for Money.

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Copyright © 2010 Pearson Education. All rights reserved. Chapter 19 The Demand for Money

Copyright © 2010 Pearson Education. All rights reserved Velocity of Money and The Equation of Exchange

Copyright © 2010 Pearson Education. All rights reserved Quantity Theory Velocity fairly constant in short run Aggregate output at full-employment level Changes in money supply affect only the price level Movement in the price level results solely from change in the quantity of money

Copyright © 2010 Pearson Education. All rights reserved Quantity Theory of Money Demand Divide both sides by V When the money market is in equilibrium M = M d Let Because k is constant, the level of transactions generated by a fixed level of PY determines the quantity of M d. The demand for money is not affected by interest rates

Copyright © 2010 Pearson Education. All rights reserved Quantity Theory of Money Demand Demand for money is determined by: –The level of transactions generated by the level of nominal income PY –The institutions in the economy that affect the way people conduct transactions and thus determine velocity and hence k

Copyright © 2010 Pearson Education. All rights reserved FIGURE 1 Change in the Velocity of M1 and M2 from Year to Year, 1915–2008 Sources: Economic Report of the President; Banking and Monetary Statistics;

Copyright © 2010 Pearson Education. All rights reserved Keynes’s Liquidity Preference Theory Why do individuals hold money? –Transactions motive –Precautionary motive –Speculative motive Distinguishes between real and nominal quantities of money

Copyright © 2010 Pearson Education. All rights reserved The Three Motives

Copyright © 2010 Pearson Education. All rights reserved The Three Motives (cont’d) Velocity is not constant: –The procyclical movement of interest rates should induce procyclical movements in velocity. –Velocity will change as expectations about future normal levels of interest rates change

Copyright © 2010 Pearson Education. All rights reserved Further Developments in the Keynesian Approach Transactions demand –Baumol - Tobin model –There is an opportunity cost and benefit to holding money –The transaction component of the demand for money is negatively related to the level of interest rates –Min TC = b(Y/M)+i(M/2) –M d = (2bY/i) 1/2, where Y = income, i =interest rate, b = transaction cost, M = money demand.

Copyright © 2010 Pearson Education. All rights reserved FIGURE 2 Cash Balances in the Baumol-Tobin Model

Copyright © 2010 Pearson Education. All rights reserved Precautionary Demand Similar to transactions demand As interest rates rise, the opportunity cost of holding precautionary balances rises The precautionary demand for money is negatively related to interest rates

Copyright © 2010 Pearson Education. All rights reserved Speculative Demand Implication of no diversification Only partial explanations developed further (Tobin) –Risk averse people will diversify its portfolio and hold some money as a store of wealth –Do not provide a definite answer as to why people hold money as a store of wealth

Copyright © 2010 Pearson Education. All rights reserved Friedman’s Modern Quantity Theory of Money = demand for real money balances = measure of wealth (permanent income) = expected return on money = expected return on bonds = expected return on equity (common stocks) = expected inflation rate

Copyright © 2010 Pearson Education. All rights reserved Variables in The Money Demand Function Permanent income (average long-run income) is stable, the demand for money will not fluctuate much with business cycle movements Wealth can be held in bonds, equity and goods; incentives for holding these are represented by the expected return on each of these assets relative to the expected return on money The expected return on money is influenced by: –The services proved by banks on deposits –The interest payment on money balances

Copyright © 2010 Pearson Education. All rights reserved Differences between Keynes’s and Friedman’s Model Friedman –Includes alternative assets to money –Viewed money and goods as substitutes –The expected return on money is not constant; however, r b – r m does stay constant as interest rates rise –Interest rates have little effect on the demand for money

Copyright © 2010 Pearson Education. All rights reserved Differences between Keynes’s and Friedman’s Model (cont’d) Friedman (cont’d) –The demand for money is stable  velocity is predictable –Money is the primary determinant of aggregate spending

Copyright © 2010 Pearson Education. All rights reserved Empirical Evidence Interest rates and money demand –Consistent evidence of the interest sensitivity of the demand for money –Little evidence of liquidity trap Stability of money demand –Prior to 1970, evidence strongly supported stability of the money demand function –Since 1973, instability of the money demand function has caused velocity to be harder to predict Implications for how monetary policy should be conducted