Chapter 19 Debates in Macroeconomics Monetarism New Classical

Chapter 19 Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics Prepared by: Fernando & Yvonn Quijano © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics 19 Chapter Outline Keynesian Economics Monetarism The Velocity of Money The Quantity Theory of Money Inflation as a Purely Monetary Phenomenon The Keynesian/Monetarist Debate New Classical Macroeconomics The Development of New Classical Macroeconomics Rational Expectations Evaluating Rational-Expectations Theory Real Business Cycle Theory Supply-Side Economics Evaluating Supply-Side Economics Testing Alternative Macroeconomic Models © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 2

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics KEYNESIAN ECONOMICS In a broad sense, Keynesian economics is the foundation of modern macroeconomics. In a narrower sense, Keynesian refers to economists who advocate active government intervention in the economy. Two major schools decidedly against government intervention developed: monetarism and new classical economics. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 3

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM The main message of monetarists is that money matters. Monetarism, however, is usually considered to go beyond the notion that money matters. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 4

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics In the model of aggregate supply and aggregate demand, money matters because: a. Changes in the money supply affect the AD curve. b. Changes in the money supply shifts affect the AS curve in the short run. c. Changes in the money supply shifts affect the AS curve in the long run. d. All of the above. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 5

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics In the model of aggregate supply and aggregate demand, money matters because: a. Changes in the money supply affect the AD curve. b. Changes in the money supply shifts affect the AS curve in the short run. c. Changes in the money supply shifts affect the AS curve in the long run. d. All of the above. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 6

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM THE VELOCITY OF MONEY velocity of money The number of times a dollar bill changes hands, on average, during a year; the ratio of nominal GDP to the stock of money. The income velocity of money (V) is the ratio of nominal GDP to the stock of money (M): © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 7

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM We can expand this definition slightly by noting that nominal income (GDP) is equal to real output (income) (Y) times the overall price level (P): Through substitution: or © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 8

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM quantity theory of money The theory based on the identity M x V P x Y and the assumption that the velocity of money (V) is constant (or virtually constant). © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 9

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM THE QUANTITY THEORY OF MONEY The key assumption of the quantity theory of money is that the velocity of money is constant (or virtually constant) over time. If we let denote the constant value of V, the equation for the quantity theory can be written: © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 10

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM Testing the Quantity Theory of Money FIGURE 19. 1 The Velocity of Money, 1960 I– 2005 II © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 11

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM INFLATION AS A PURELY MONETARY PHENOMENON Inflation is always a monetary phenomenon. If the money supply does not change, the price level will not change. The view that changes in the money supply affect only the price level, without a change in the level of output, is called the “strict monetarist” view. Almost all economists agree that sustained inflation is purely a monetary phenomenon. Inflation cannot continue indefinitely without increases in the money supply. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 12

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics The “strict monetarist” view states that: a. Changes in aggregate demand cause an increase in both aggregate income and the price level. b. Inflation is a real phenomenon, not a purely monetary phenomenon. c. Changes in the money supply affect only the price level (P), not real output (Y). d. Since velocity is constant, a change in M affects both P and Y. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 13

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics The “strict monetarist” view states that: a. Changes in aggregate demand cause an increase in both aggregate income and the price level. b. Inflation is a real phenomenon, not a purely monetary phenomenon. c. Changes in the money supply affect only the price level (P), not real output (Y). d. Since velocity is constant, a change in M affects both P and Y. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 14

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics MONETARISM THE KEYNESIAN/MONETARIST DEBATE Milton Friedman has been the leading spokesman for monetarism over the last few decades. Most monetarists do not advocate an activist monetary policy stabilization. Monetarists advocate a policy of steady and slow money growth, at a rate equal to the average growth of real output (Y). Keynesianism and monetarism are at odds with each other. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 15

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS The challenge to Keynesian and related theories has come from a school sometimes referred to as the new classical macroeconomics. Like monetarism and Keynesianism, this term is vague. No two new classical macroeconomists think exactly alike, and no single model completely represents this school. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 16

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics Most monetarists, including Milton Friedman, blame most of the instability in the economy on: a. The volatility of investment spending. b. Changes in aggregate demand. c. Changes in aggregate supply. d. The federal government. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 17

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics Most monetarists, including Milton Friedman, blame most of the instability in the economy on: a. The volatility of investment spending. b. Changes in aggregate demand. c. Changes in aggregate supply. d. The federal government. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 18

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS THE DEVELOPMENT OF NEW CLASSICAL MACROECONOMICS On theoretical level, new classical macroeconomists argue that traditional models have assumed that expectations are formed in naive ways. Naive expectations are inconsistent with the assumptions of microeconomics. If people are out to maximize utility and profits, they should form their expectations in a smarter way. New classical theories were an attempt to explain the apparent breakdown in the 1970 s of the simple inflation-unemployment trade-off predicted by the Phillips Curve. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 19

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics Which of the following events helped motivate the formulation of new classical economics? a. The Great Depression. b. The mercantilist revolution and the birth of laissez faire. c. The stagflation of the 1970 s. d. The turnaround from federal budget deficits to surpluses during the Clinton administration. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 20

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics Which of the following events helped motivate the formulation of new classical economics? a. The Great Depression. b. The mercantilist revolution and the birth of laissez faire. c. The stagflation of the 1970 s. d. The turnaround from federal budget deficits to surpluses during the Clinton administration. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 21

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS RATIONAL EXPECTATIONS rational-expectations hypothesis The hypothesis that people know the “true model” of the economy and that they use this model to form their expectations of the future. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 22

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS Even though uncertainty exists, if you know the “model” generating the uncertainty, it is possible to have expectations about the future that are “on average” correct. You do not know whether a random coin toss will come up heads or tails. You do know that if you toss a fair coin 100 times, it will come up heads about 50 times. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 23

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS Rational Expectations and Market Clearing If firms have rational expectations and if they set prices and wages on this basis, then, on average, prices and wages will be set at levels that ensure equilibrium in the goods and labor markets. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 24

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics When expectations are rational, which of the following stabilization policies is more desirable? a. Fiscal policy tools as the preferred means of stabilization. b. Monetary policy tools as the preferred means of stabilization. c. Intervention only when unpredictable shocks affect the economy. d. No need for government stabilization policies of any kind. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 25

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics When expectations are rational, which of the following stabilization policies is more desirable? a. Fiscal policy tools as the preferred means of stabilization. b. Monetary policy tools as the preferred means of stabilization. c. Intervention only when unpredictable shocks affect the economy. d. No need for government stabilization policies of any kind. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 26

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS The Lucas Supply Function Lucas supply function The supply function embodies the idea that output (Y) depends on the difference between the actual price level and the expected price level. price surprise Actual price level minus expected price level. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 27

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS Policy Implications of the Lucas Supply Function Rational-expectations theory combined with the Lucas supply function proposes a very small role for government policy in the economy. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 28

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics To derive his supply function, Lucas starts with the idea that: a. People and firms are specialists in production but generalists in consumption. b. People and firms are specialists in consumption but generalists in production. c People are generalists in both consumption and production. d Firms are specialists in production, and households are specialists in consumption. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 29

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics To derive his supply function, Lucas starts with the idea that: a. People and firms are specialists in production but generalists in consumption. b. People and firms are specialists in consumption but generalists in production. c People are generalists in both consumption and production. d Firms are specialists in production, and households are specialists in consumption. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 30

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS EVALUATING RATIONAL-EXPECTATIONS THEORY If expectations are not rational, there are likely to be unexploited profit opportunities— most economists believe such opportunities are rare and short-lived. The argument against rational expectations is that it required households and firms to know too much. People must know the true model (or at least a good approximation of the true model) to form rational expectations, and this knowledge is a lot to expect. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 31

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics NEW CLASSICAL MACROECONOMICS REAL BUSINESS CYCLE THEORY real business cycle theory An attempt to explain business cycle fluctuations under the assumptions of complete price and wage flexibility and rational expectations. It emphasizes shocks to technology and other shocks. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 32

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics In the context of the AS/AD model, if prices and wages are perfectly flexible, then: a. The AS curve is vertical in the long run but not in the short run. b. Events that shift the AD curve have a strong impact on real output. c. The AS curve is vertical, even in the short run. d. Nominal wages are always ahead of real wages. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 33

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics In the context of the AS/AD model, if prices and wages are perfectly flexible, then: a. The AS curve is vertical in the long run but not in the short run. b. Events that shift the AD curve have a strong impact on real output. c. The AS curve is vertical, even in the short run. d. Nominal wages are always ahead of real wages. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 34

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics SUPPLY-SIDE ECONOMICS Orthodox macro theory consists of demandoriented theories that failed to explain the stagflation of the 1970 s. Supply-side economists believe that the real problem was that high rates of taxation and heavy regulation had reduced the incentive to work, to save, and to invest. What was needed was not a demand stimulus but better incentives to stimulate supply. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 35

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics SUPPLY-SIDE ECONOMICS The Laffer Curve FIGURE 19. 2 The Laffer Curve © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 36

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics Refer to the figure below. At which point should tax rates be cut? a. b. c. d. At point A. At point B. At both points A and B. At neither point A nor B. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 37

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics Refer to the figure below. At which point should tax rates be cut? a. b. c. d. At point A. At point B. At both points A and B. At neither point A nor B. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 38

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics SUPPLY-SIDE ECONOMICS Laffer Curve With the tax rate measured on the vertical axis and tax revenue measured on the horizontal axis, the Laffer Curve shows there is some tax rate beyond which the supply response is large enough to lead to a decrease in tax revenue for further increases in the tax rate. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 39

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics SUPPLY-SIDE ECONOMICS EVALUATING SUPPLY-SIDE ECONOMICS Among the criticisms of supply-side economics is that it is unlikely a tax cut would substantially increase the supply of labor. When households receive a higher after-tax wage, they might have an incentive to work more, but they may also choose to work less. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 40

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics TESTING ALTERNATIVE MACROECONOMIC MODELS Models differ in ways that are hard to standardize. If people have rational expectations, they are using the true model, but there is no way to know what model is in fact the true one. There is only a small amount of data available to test macroeconomic hypotheses —only eight business cycles since 1950. © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 41

CHAPTER 19: Debates in Macroeconomics: Monetarism, New Classical Theory, and Supply-Side Economics REVIEW TERMS AND CONCEPTS Laffer Curve Lucas supply function price surprise quantity theory of money rational-expectations hypothesis real business cycle theory velocity of money (V) © 2007 Prentice Hall Business Publishing Principles of Economics 8 e by Case and Fair 42