Inflation IS Money Supply Growth, Not Prices Denominated in Money

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Frank Shostak
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In the recent Wall Street Journal article “Inflation Surge Earns Monetarism Another Look,” Greg Ip writes that a recent surge in inflation is not likely to bring authorities to reembrace monetarism. According to Ip, money supply had a poor record of predicting US inflation because of conceptual and definitional problems that haven’t gone away.

The head of the monetarist school, the late Milton Friedman, held that inflation is always and everywhere a monetary phenomenon. Friedman and other monetarists believed that the key driving factor for general increases in prices is increases in money supply.

This viewpoint has come under scrutiny since the early 1980s because the correlation between inflation and money supply disappeared. According to Ip in 2020, Alan Detmeister, an economist at UBS Group AG and formerly of the Fed, found inflation’s correlation to M2 since the early 1980s was weak and its correlation to both the monetary base and M1 was negative. Most economists have stopped using money supply as an indicator for inflation since the early 1980s.

Many mainstream economists have attributed the breakdown in the correlation between the money supply and inflation on the unstable velocity of money. What is it? According to the famous equation of exchange, MV = PT, where:

M stands for money,

V stands for the velocity of money,

P stands for the price level, and

T for the volume of transactions.

This equation states that money multiplied by velocity equals the value of transactions. Many economists employ GDP (gross domestic product) instead of PT, thereby concluding that

MV = GDP = P (real GDP).

The equation of exchange appears to offer a wealth of information regarding the state of an economy. For instance, if one were to assume stable velocity, then for a given stock of money one can establish the value of GDP. Furthermore, a given real output and a given stock of money enables us to establish the price level.

For most economists the equation of exchange is regarded as a very useful analytical tool. The debates that economists have are predominantly with respect to the stability of velocity. If velocity is stable, then money is seen as a very powerful tool in tracking the economy. The importance of money as an economic indicator however diminishes once velocity becomes less stable and hence less predictable.

However, an unstable velocity could occur because of an unstable demand for money. Most experts believe that since the early 1980s, innovations in financial markets made money velocity unstable. This in turn made money an unreliable indicator of inflation.

We believe the alleged failure of money as an indicator of inflation emanates from an erroneous definition of inflation and money supply. This failure has nothing to do with an unstable demand for money, and just because people change their demand for money does not imply instability. Because an individual’s goals may change, he might decide that it benefits him to hold less money. Sometime in the future, he might increase his demand for money. What could possibly be wrong with this? The same goes for any other goods and services—demand for them changes all the time.

Defining Inflation

According to Murray Rothbard and Ludwig von Mises, inflation is defined as the increase of the money supply out of “thin air.” Following this definition, one can ascertain that increases in money supply set economic impoverishment in motion by creating an exchange of nothing for something, the so-called counterfeit effect.

General increases in prices are likely to be symptoms of inflation—but not always, however. Note that prices are determined by both real and monetary factors. Consequently, it can occur that if the real factors are “pulling things” in an opposite direction to monetary factors, no visible change in prices is going to take place. If the growth rate of money is 5 percent and the growth rate of goods supply is 1 percent then prices are likely to increase by 4 percent. If, however, the growth rate in goods supply is also 5 percent then no general increase in prices is likely to take place.

If one were to hold that inflation is about increases in prices, then one would conclude that, despite the increase in money supply by 5 percent, inflation is 0 percent. However, if we were to follow the definition that inflation is about increases in the money supply, then we would conclude that inflation is 5 percent, regardless of any movement in prices.

Defining Money Supply

Prior to 1980, it was popular to employ various money supply definitions in the assessment of the changes in the prices of goods and services. The criterion for the selection of a particular definition was its correlation with national income. However, since the early 1980s, correlations between various definitions of money and national income have broken down. Some analysts believe that this breakdown is because of changes in financial markets, making past definitions of money irrelevant.

A definition presents the essence of a particular entity, something no statistical correlation could ever provide. To establish the definition of money we have to explain the origins of the money economy. Money has emerged because barter cannot support the market economy. Money is the general medium of exchange and has evolved from the most marketable commodity. Mises wrote:

There would be an inevitable tendency for the less marketable of the series of goods used as media of exchange to be one by one rejected until at last only a single commodity remained, which was universally employed as a medium of exchange; in a word, money.

Since the general medium of exchange was selected out of a wide range of commodities, the emerged money must be a commodity. Rothbard wrote:

In contrast to directly used consumers’ or producers’ goods, money must have pre-existing prices on which to ground a demand. But the only way this can happen is by beginning with a useful commodity under barter, and then adding demand for a medium to the previous demand for direct use (e.g., for ornaments, in the case of gold).

Through an ongoing selection process, individuals settled on gold as standard money. In today’s monetary system, the core of the money supply is no longer gold, but rather coins and notes issued by the government and central bank that are employed in transactions as goods and services are exchanged for cash. Hence, one trades all other goods and services for money.

Part of the stock of cash is stored through bank deposits. Once someone places money in a bank’s warehouse, he is engaging in a claim transaction, never relinquishing his ownership of the money. Consequently, these deposits, which are labelled demand deposits, are part of money.

This is contrasted with a credit transaction, where the lender relinquishes his claim over the money for the duration of the loan. In a credit transaction, money is transferred from a lender to a borrower, but the overall amount of money in the economy does not change because of the credit transaction.

The introduction of electronic money seems to cast doubt on the definition of money. It would appear that deregulated financial markets generate various forms of new money. Notwithstanding, various forms of electronic money or e-money, like digital currency, do not have a “life of their own.”

Various financial innovations do not generate new forms of money but rather new ways of employing existing money in transactions. Irrespective of these financial innovations, the nature of money does not change. Money is the thing that all other goods and services are traded for. Once the essence of money is established by excluding various credit transactions, one can identify the status of inflation. Changes in prices are not going to be relevant here.

Conclusion

Contrary to popular thinking, inflation is not about increases in the prices of goods and services but about increases in money supply. Following this definition, we can establish that the key damage caused by inflation is economic impoverishment through the exchange of nothing for something. What matters as far as inflation is concerned is not the correlation between money supply and the prices of goods and service but increases in money supply.

Contrary to popular thinking, the essence of money did not change because of various financial innovations. Money is a thing that is employed as a medium of exchange. Furthermore, according to Mises’s regression theorem, the historical link between paper currency and gold is what holds the present monetary system together.

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