The Phillips Curve and Inflationary Spirals

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Do curso por University of California, Irvine

Strategic Business Management - Macroeconomics

22 classificações

University of California, Irvine

Strategic Business Management - Macroeconomics

22 classificações

This course weds business strategy with the principles of macroeconomics. It offers valuable a powerful toolbox together with cases and lessons across all major functions of business, management, from finance, operations management, and marketing to human resource management, organizational behavior, statistics, and, of course, business strategy.

Na lição

Inflation and the Warring Schools of Macroeconomics

Two Types of Inflation and the Keynesian Dilemma7:45

The Core Rate of Inflation and Inflationary Expectations7:57

The Phillips Curve and Inflationary Spirals6:51

The Natural Rate of Unemployment and Monetarist View of Inflationary Spirals12:28

Monetarist, Keynesian, and Supply Side Inflation Cures11:01

New Classical Economics and the Theory of Rational Expectations11:20

The Three Ranges of the Economy6:04

Strategic Management of Inflation Risk11:18

Conheça os instrutores

Dr. Peter Navarro
Professor
Paul Merage School of Business

[MUSIC]

At different times in global economic history, inflation has spiraled

out of control, sometimes in spectacular hyperinflation fashion.

The poster child for inflationary spirals and

hyperinflation are the Wymer Republic of Germany in the 1920's,

and Hungary, right after World War II, in the 1940's.

In Germany, at the height of the spiral, $1 was worth 4 trillion

German while in Hungary, inflation doubled daily.

Yes, everyday, during the worst of the crisis.

While these examples are extreme,

the 1970s of the last century also featured double digit

inflation rates in America with much of the latter part of that difficult decade.

In the 1970s, very long ago that they may be,

actually turn out to be a very good laboratory for

exploring the causes of and cures for an inflationary spiral, and for

the introduction of a very useful tool known as the Phillip's curve.

[MUSIC]

The Phillip's curve was developed by English economist A.W.

Phillips from his study of more than a century's worth

of data on unemployment and money wages in the United Kingdom.

[SOUND] From his data analysis, Phillip's found an inverse

relationship between the rate of inflation and

the rate of unemployment, to it as the unemployment rate falls,

the more robust GDP growth rate, the inflation rate rises.

To convey the idea of the Phillip's curve,

take a look at the aggregate supply, aggregate demand model in this figure.

Holding the aggregate supply curve steady, we start at AD not,

but an increase in aggregate demand shifts the AD curve

upwards from AD1, to AD2, and eventually to AD3.

The result is that the price level rises from P not to P3

while output increases, From Q not to Q3.

So what do you think happens to the unemployment rate as output rises?

Take a minute now to jot down your answer.

[MUSIC]

[SOUND] Well unless robots are doing all the work,

the increase in real output will almost certainly be accompanied

by a fall in the unemployment rate as the price level is rising.

In fact, this is the essence of the Phillip's curve relationship,

and it is illustrated in this figure.

[NOISE] This figure shows the theoretical inverse relationship

between inflation and unemployment.

So if the unemployment rate is, say around 5%, the inflation rate is around 2%.

But what happens if the unemployment rate drops to around 2%?

What will be the inflation rate?

Please quickly jot down your answer before moving on.

[MUSIC]

That's right, the annual rate of inflation will jump to around 6%.

Now take a look at this figure, which charts the co-movements of the rates of

inflation and unemployment between 1961 and 1969,

and note the nice downward sloping curve,

which appears to provide strong empirical evidence that Phillip's curve and

the inverse relationship between inflation and the unemployment actually exist.

On the basis of this, and earlier historical evidence,

most economists came to believe, prior to the 1970s,

that the stable predictable trade off exists between unemployment and

inflation, and here's the key point in macroeconomic policy implication for

the use of discretionary Keynesian stimulus policies.

If there is indeed a predictable tradeoff between unemployment and

inflation, the government can always use fiscal or

monetary policy to expand the economy a bit more to reduce unemployment,

and the only price a nation would pay is a bit more inflation.

That's not a bad Keynesian stimulus trade off to keep people employed.

[SOUND] The 1970s came along, however,

to cast a long shadow of doubt over the very existence of the y77 Curl,

and therefore, the efficacy of Keynesian stimulus.

[MUSIC]

So just what happened in the 1970s to shake economists' faith in

the Phillip's Curve?

Let's find out by looking at what happens to our Phillip's Curve when you add

data points to the stagflation years,

1971 to 1979, showing the co-movements of the rates of inflation and unemployment.

Wow.

In this case, the nice downward Phillip's curve turns into a squiggly looking,

an upward-sloping Phillip's curl suggesting that there

may be no relationship between the rates of inflation and unemployment at all.

Of course, if that is the case,

the Keynesian stimulus may only lead to inflation.

[SOUND] So is there a tradeoff between the rates of inflation and

unemployment or not?

That, in fact, is the mystery that we're going to try to solve in our next module

as we introduce the monitors concept, of the natural rate of unemployment,

and analyze the possible origins of inflationary spirals.

So, when you're ready, let's move on.

[MUSIC]

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