The Short-Run Tradeoff between Inflation and Unemployment Chapter 33 Copyright © 2001 by Harcourt, Inc. All rights reserved. Requests for permission to make copies of any part of the work should be mailed to: Permissions Department, Harcourt College Publishers, 6277 Sea Harbor Drive, Orlando, Florida 32887 -6777.
Unemployment and Inflation u The natural rate of unemployment depends on various features of the labor market. u Examples include minimum-wage laws, the market power of unions, the role of efficiency wages, and the effectiveness of job search. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Unemployment and Inflation u The inflation rate depends primarily on growth in the quantity of money, controlled by the Fed. u The misery index, one measure of the “health” of the economy, adds together the inflation rate and unemployment rate. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Unemployment and Inflation u Society faces a short-run tradeoff between unemployment and inflation. u If policymakers expand aggregate demand, they can lower unemployment, but only at the cost of higher inflation. u If they contract aggregate demand, they can lower inflation, but at the cost of temporarily higher unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Phillips Curve The Phillips curve illustrates the short-run relationship between inflation and unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Phillips Curve. . . Inflation Rate (percent per year) B 6 A 2 Phillips curve 0 4 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 7 Unemployment Rate (percent)
Aggregate Demand, Aggregate Supply, and the Phillips Curve u The Phillips curve shows the short-run combinations of unemployment and inflation that arise as shifts in the aggregate demand curve move the economy along the short-run aggregate supply curve. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Aggregate Demand, Aggregate Supply, and the Phillips Curve u The greater the aggregate demand for goods and services, the greater is the economy’s output, and the higher is the overall price level. u A higher level of output results in a lower level of unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
How the Phillips Curve is Related to the Model of Aggregate Demand Aggregate Supply. . . (a) The Model of AD and AS Price Level Short-run AS 102 Inflation Rate (percent per year) B 106 A (b) The Phillips Curve High AD 6 Low AD 0 7, 500 (unemployment is 7%) 2 8, 000 (unemployment is 7%) 0 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. B A 7 4 (output is 8, 000) 7, 500) Phillips curve Unemployment Rate (percent)
Shifts in the Phillips Curve: The Role of Expectations The Phillips curve seems to offer policymakers a menu of possible inflation and unemployment outcomes. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Long-Run Phillips Curve u. In the 1960 s, Friedman and Phelps concluded that inflation and unemployment are unrelated in the long run. u As a result, the long-run Phillips curve is vertical at the natural rate of unemployment. u Monetary policy could be effective in the short run but not in the long run. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Long-Run Phillips Curve. . . Inflation Rate 1. When the Fed increases the growth rate of the money supply, the rate of inflation increases… High inflation Low inflation 0 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. Long-run Phillips curve B A Natural rate of unemployment 2. … but unemployment remains at its natural rate in the long run. Unemployment Rate
Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. How the Phillips Curve is Related to the Model of Aggregate Demand Aggregate Supply… (a) The Model of Aggregate Demand Aggregate Supply Price Level Long-run aggregate supply (b) The Phillips Curve Inflation Rate P 2 1. An increase in the money supply increases aggregate demand… P 1 Long-run Phillips curve AD 2 0 2. …raises the price level… Natural rate of output Aggregate demand, AD 1 Quantity of Output B 3. …and increases the inflation rate… A 0 Natural rate of unemployment 4. …but leaves output and unemployment at their natural rates. Unemployment Rate
Expectations and the Short-Run Phillips Curve Expected inflation measures how much people expect the overall price level to change. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Expectations and the Short-Run Phillips Curve u In the long run, expected inflation adjusts to changes in actual inflation. u The Fed’s ability to create unexpected inflation exists only in the short run. u Once people anticipate inflation, the only way to get unemployment below the natural rate is for actual inflation to be above the anticipated rate. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Expectations and the Short-Run Phillips Curve Unemployment Rate = Natural rate of unemployment - a( Actual inflation - Expected inflation This equation relates the unemployment rate to the natural rate of unemployment, actual inflation, and expected inflation. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. )
Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. How Expected Inflation Shifts the Short-Run Phillips Curve. . . Inflation Rate Long-run Phillips curve B 1. Expansionary policy moves the economy up along the shortrun Phillips curve. . . 0 2. …but in the long-run, expected inflation rises, and the short-run Phillips curve shifts to the right. C Short-run Phillips curve with high expected inflation A Short-run Phillips curve with low expected inflation Natural rate of unemployment Unemployment Rate
The Natural-Rate Hypothesis u The view that unemployment eventually returns to its natural rate, regardless of the rate of inflation, is called the natural-rate hypothesis. u Historical observations support the natural-rate hypothesis. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Natural Experiment for the Natural Rate Hypothesis u The concept of a stable Phillips curve broke down in the early ’ 70 s. u During the ’ 70 s and ’ 80 s, the economy experienced high inflation and high unemployment simultaneously. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Phillips Curve in the 1960 s. . . Inflation Rate (percent per year) 10 8 6 1968 4 1967 1966 1965 2 0 1 1962 1964 1963 1961 2 3 4 5 6 7 8 Unemployment Rate (percent) Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 9 10
The Breakdown of the Phillips Curve. . . Inflation Rate (percent per year) 10 8 1973 6 1969 1968 4 1967 1971 1970 1972 1966 1965 2 0 1 1962 1964 1963 1961 2 3 4 5 6 7 8 Unemployment Rate (percent) Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 9 10
Shifts in the Phillips Curve: The Role of Supply Shocks u Historical events have shown that the short-run Phillips curve can shift due to changes in expectations. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Shifts in the Phillips Curve: The Role of Supply Shocks u The short-run Phillips curve also shifts because of shocks to aggregate supply. u Major adverse changes in aggregate supply can worsen the short-run tradeoff between unemployment and inflation. u An adverse supply shock gives policymakers a less favorable tradeoff between inflation and unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Shifts in the Phillips Curve: The Role of Supply Shocks u. A supply shock is an event that directly affects firms’ costs of production and thus the prices they charge. u It shifts the economy’s aggregate supply curve. . . u … and as a result, the Phillips curve. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
An Adverse Shock to Aggregate Supply. . . (a) The Model of Aggregate Demand Aggregate Supply Price Level 3. …and raises the price level… AS 2 P 2 0 Inflation Rate Aggregate supply, AS 1 A A PC 2 Aggregate demand Y 2 Y 1 Quantity of Output 2. …lowers output… Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 4. …giving policymakers a less favorable tradeoff between unemployment and inflation. B 1. An adverse shift in aggregate supply… B P 1 (b) The Phillips Curve 0 Phillips curve, PC 1 Unemployment Rate
Shifts in the Phillips Curve: The Role of Supply Shocks u In the 1970 s, policymakers faced two choices when OPEC cut output and raised worldwide prices of petroleum. u Fight the unemployment battle by expanding aggregate demand accelerate inflation. u Fight inflation by contracting aggregate demand endure even higher unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Supply Shocks of the 1970 s. . . Inflation Rate (percent per year) 10 1974 8 6 1981 1975 1979 1978 1977 1973 4 1980 1976 1972 2 0 1 2 3 4 5 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 6 7 8 9 10 Unemployment Rate (percent)
The Cost of Reducing Inflation u To reduce inflation, the Fed has to pursue contractionary monetary policy. u When the Fed slows the rate of money growth, it contracts aggregate demand. u This reduces the quantity of goods and services that firms produce. u This leads to a rise in unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. Disinflationary Monetary Policy in the Short Run and the Long Run. . . Inflation Rate Long-run Phillips curve A 1. Contractionary policy moves the economy down along the short-run Phillips curve. . . Short-run Phillips curve with high expected inflation C B Short-run Phillips curve with low expected inflation 0 Natural rate of unemployment Unemployment Rate 2. . but in the long run, expected inflation falls and the short-run Phillips curve shifts to the left.
The Cost of Reducing Inflation u To reduce inflation, an economy must endure a period of high unemployment and low output. u When the Fed combats inflation, the economy moves down the short-run Phillips curve. u The economy experiences lower inflation but at the cost of higher unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Cost of Reducing Inflation u The sacrifice ratio is the number of percentage points of annual output that is lost in the process of reducing inflation by one percentage point. u An estimate of the sacrifice ratio is five. u To reduce inflation from about 10% in 1979 -1981 to 4% would have required an estimated sacrifice of 30% of annual output! Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Rational Expectations The theory of rational expectations suggests that people optimally use all the information they have, including information about government policies, when forecasting the future. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Rational Expectations u Expected inflation explains why there is a tradeoff between inflation and unemployment in the short run but not in the long run. u How quickly the short-run tradeoff disappears depends on how quickly expectations adjust. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Rational Expectations u The theory of rational expectations suggests that the sacrifice-ratio could be much smaller than estimated. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Volcker Disinflation u When Paul Volcker was Fed chairman in the 1970 s, inflation was widely viewed as one of the nation’s foremost problems. u Volcker succeeded in reducing inflation (from 10% to 4%), but at the cost of high employment (about 10% in 1983). Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Volcker Disinflation. . . Inflation Rate (percent per year) 10 A 1980 1981 1979 8 1982 6 1984 B 1987 1983 1985 C 1986 4 2 0 1 2 3 4 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 5 6 7 8 9 10 Unemployment Rate (percent)
The Greenspan Era u Alan Greenspan’s term as Fed chairman began with a favorable supply shock. u In 1986, OPEC members abandoned their agreement to restrict supply. u This led to falling inflation and falling unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Greenspan Era. . . Inflation Rate (percent per year) 10 8 6 1990 1991 1989 1984 1988 1985 1987 1992 1995 1994 1993 1986 4 2 00 1 2 3 4 5 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 6 7 8 9 10 Unemployment Rate (percent)
The Greenspan Era u Fluctuations in inflation and unemployment in recent years have been relatively small due to the Fed’s actions. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Summary u The Phillips curve describes a negative relationship between inflation and unemployment. u By expanding aggregate demand, policymakers can choose a point on the Phillips curve with higher inflation and lower unemployment. u By contracting aggregate demand, policymakers can choose a point on the Phillips curve with lower inflation and higher unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Summary u The tradeoff between inflation and unemployment described by the Phillips curve holds only in the short run. u The long-run Phillips curve is vertical at the natural rate of unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Summary u The short-run Phillips curve also shifts because of shocks to aggregate supply. u An adverse supply shock gives policymakers a less favorable tradeoff between inflation and unemployment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Summary u When the Fed contracts growth in the money supply to reduce inflation, it moves the economy along the short-run Phillips curve. u This results in temporarily high unemployment. u The cost of disinflation depends on how quickly expectations of inflation fall. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Summary u Because monetary and fiscal policy can influence aggregate demand, the government sometimes uses these policy instruments in an attempt to stabilize the economy. u Changes in attitudes by households and firms shift aggregate demand; if the government does not respond, the result is undesirable and unnecessary fluctuations in output and employment. Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
Graphical Review Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc.
The Phillips Curve. . . Inflation Rate (percent per year) B 6 A 2 Phillips curve 0 4 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 7 Unemployment Rate (percent)
How the Phillips Curve is Related to the Model of Aggregate Demand Aggregate Supply. . . (a) The Model of AD and AS Price Level Short-run AS 102 Inflation Rate (percent per year) B 106 A (b) The Phillips Curve High AD 6 Low AD 0 7, 500 (unemployment is 7%) 2 8, 000 (unemployment is 7%) 0 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. B A 7 4 (output is 8, 000) 7, 500) Phillips curve Unemployment Rate (percent)
The Long-Run Phillips Curve. . . Inflation Rate 1. When the Fed increases the growth rate of the money supply, the rate of inflation increases… High inflation Low inflation 0 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. Long-run Phillips curve B A Natural rate of unemployment 2. … but unemployment remains at its natural rate in the long run. Unemployment Rate
Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. How the Phillips Curve is Related to the Model of Aggregate Demand Aggregate Supply… (a) The Model of Aggregate Demand Aggregate Supply Price Level Long-run aggregate supply (b) The Phillips Curve Inflation Rate P 2 1. An increase in the money supply increases aggregate demand… P 1 Long-run Phillips curve AD 2 0 2. …raises the price level… Natural rate of output Aggregate demand, AD 1 Quantity of Output B 3. …and increases the inflation rate… A 0 Natural rate of unemployment 4. …but leaves output and unemployment at their natural rates. Unemployment Rate
Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. How Expected Inflation Shifts the Short-Run Phillips Curve. . . Inflation Rate Long-run Phillips curve B 1. Expansionary policy moves the economy up along the shortrun Phillips curve. . . 0 2. …but in the long-run, expected inflation rises, and the short-run Phillips curve shifts to the right. C Short-run Phillips curve with high expected inflation A Short-run Phillips curve with low expected inflation Natural rate of unemployment Unemployment Rate
The Phillips Curve in the 1960 s. . . Inflation Rate (percent per year) 10 8 6 1968 4 1967 1966 1965 2 0 1 1962 1964 1963 1961 2 3 4 5 6 7 8 Unemployment Rate (percent) Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 9 10
The Breakdown of the Phillips Curve. . . Inflation Rate (percent per year) 10 8 1973 6 1969 1968 4 1967 1971 1970 1972 1966 1965 2 0 1 1962 1964 1963 1961 2 3 4 5 6 7 8 Unemployment Rate (percent) Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 9 10
An Adverse Shock to Aggregate Supply. . . (a) The Model of Aggregate Demand Aggregate Supply Price Level 3. …and raises the price level… AS 2 P 2 0 Inflation Rate Aggregate supply, AS 1 A A PC 2 Aggregate demand Y 2 Y 1 Quantity of Output 2. …lowers output… Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 4. …giving policymakers a less favorable tradeoff between unemployment and inflation. B 1. An adverse shift in aggregate supply… B P 1 (b) The Phillips Curve 0 Phillips curve, PC 1 Unemployment Rate
The Supply Shocks of the 1970 s. . . Inflation Rate (percent per year) 10 1974 8 6 1981 1975 1979 1978 1977 1973 4 1980 1976 1972 2 0 1 2 3 4 5 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 6 7 8 9 10 Unemployment Rate (percent)
Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. Disinflationary Monetary Policy in the Short Run and the Long Run. . . Inflation Rate Long-run Phillips curve A 1. Contractionary policy moves the economy down along the short-run Phillips curve. . . Short-run Phillips curve with high expected inflation C B Short-run Phillips curve with low expected inflation 0 Natural rate of unemployment Unemployment Rate 2. . but in the long run, expected inflation falls and the short-run Phillips curve shifts to the left.
The Volcker Disinflation. . . Inflation Rate (percent per year) 10 A 1980 1981 1979 8 1982 6 1984 B 1987 1983 1985 C 1986 4 2 0 1 2 3 4 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 5 6 7 8 9 10 Unemployment Rate (percent)
The Greenspan Era. . . Inflation Rate (percent per year) 10 8 6 1990 1991 1989 1984 1988 1985 1987 1992 1995 1994 1993 1986 4 2 00 1 2 3 4 5 Harcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. 6 7 8 9 10 Unemployment Rate (percent)
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