Is Inflation Driven more by "Expectations" than by the Money Supply?

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Published : January 03rd, 2018
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For most economic commentators the underlying driving force of inflation is inflationary expectations1. For instance, if there is a sharp increase in the price of oil, individuals may form higher inflationary expectations that could set in motion spiraling price inflation. Or so it is held.

If expectations could somehow be made less responsive to various price shocks, then over time this would mitigate the effect of a price shock on price inflation, it is argued. 

Once we accept that inflation expectations are the driving force of the inflationary process, the next step is to discover a way — using central-bank policies — to make these expectations less sensitive to various price shocks. Once this happens, then expectations have become "anchored," and various price shocks such as sharp increases in oil or food prices are likely to be of a transitory nature. This means that over time price shocks are unlikely to have much effect on the rate of inflation.

How To "Anchor" Inflation Expectations: Inflation Targeting

To make inflation expectations well-anchored individuals must be clear about the monetary policy of central bank policy makers. If central bankers make it clear they plan to pursue a specific level of price inflation, they believe they can manage present and future expectations for inflation. On the other hand, as long as individuals are unclear about the precise goal policymakers are aiming at with respect to inflation, it will be difficult to bring inflationary expectations to a state of equilibrium.

It's Not Really About Expectations

This is all an interesting theory, but the key factor behind inflation is not expectations — it's growth in the money supply.  

After all, without a preceding increase in money supply there cannot be general increase in prices, which is what most mainstream commentators mea when they speak of "inflation." 

A price of a good is the amount of dollars paid per unit of a good. For a given amount of goods, if the stock of money remains unchanged the amount of dollars spent per unit of a good will stay unchanged, all other things being equal. 

For example, let us say that because of a sudden sharp increase in the price of oil people have formed higher inflation expectations. If the money stock remains unchanged, then no general increase in prices can take place, all other things being equal.

In this case, all that we will have here is a situation where the prices of oil and energy related goods will go up while the prices of other goods and services will go down. (If more money spent on oil and oil products obviously that less money left for other goods and services — note again a price is the amount of money per unit of a good. Only if more money is created will there be a general increase in prices. 

We can conclude that changes in the money supply underpin the underlying rises in prices, and not inflationary expectations. Without the creation of new money, as augmented by central banks, all other things being equal, no general increase in price inflation can take place. Whether or not consumers expected a certain amount of inflation then becomes irrelevant. 

  • 1. Ben S. Bernanke “Inflation Expectations and Inflation Forecasting” July 10,2007, speech at the NBER.
Source : mises.org
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Frank Shostak's consulting firm, Applied Austrian School Economics, provides in-depth assessments and reports of financial markets and global economies.
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