In the IEA conceptual frame of reference, the money stock (M1) is an economy's total inventory of all transaction money (currency and checkable accounts) that is used to service the flow of goods-and-services expenditure (GDP) in that economy.

On the individual level, each individual, household, or business maintains whatever it feels to be a sufficient balance of cash and checking account to manage the purchase of goods and services. This inventory behaves in much the same way that a grocer's inventory does in managing the flow of groceries off the shelves, and the same inventory/sales ratio the grocer uses to manage the business is applicable to individuals, households, and -- in fact -- to the whole economy, which is the sum of all these actors.

At the level of the economy, IEA refers to this stock/flow ratio -- M1/GDP -- as the "Money Demand Ratio," and it is as characteristic of the way the economy does business as is a grocer's inventory/sales ratio -- e.g.,

• If the cost of holding inventory (M1) increases, there is an incentive to lower the level of inventory;
• however, this will decrease sales unless increased efficiency in managing inventory makes it possible to produce the same level of sales at a lower inventory level.

That these factors govern the behavior of the economy as a whole is borne out in the following chart:

This chart shows the two primary components of the money stock -- the currency and checkable deposits. The chart shows the latter portion of what was a more-or-less steady decline in the checkable deposits component from about 50% at the end of WWII to about 10% in 1980. This was a period of increasing technological efficiencies in handling money, and as a result, less and less money stock was needed to service a growing GDP. A decline such as this in the Money Demand Ratio -- which can often eliminate the need for newly-created money that would otherwise be needed to service a growing economy -- can be thought of as the "new money equivalent" of a shrinking MDR.

The damage of the MDR as a macroeconomic tool -- During the great OPEC-induced inflation which began in the mid-70's, the Federal Reserve broke the long-time wall between money and other financial assets provided by the prohibition of interest on checkable deposits, creating the hybrid NOW-account -- a checkable account with interest.

Prior to this, decisions by individuals or businesses about how much money to keep in a checking account were governed by the simple balance between what they needed for their expenditures and what they could get in the way of interest (or other returns) if they invested the money instead of leaving it in the checking account. The Fed's decision to permit interest on checking accounts created a potential investment incentive for keeping money in a checking account that was not needed for (GDP) expenditures. Decisions on how much M1 transaction money to hold now became influenced by interest rate comparisons with other investment vehicles such as CDs and savings accounts.

This breakdown of the wall between "money" and "credit" removed the close link between M1 money inventory and the GDP flows it finances. As a result, monetary policy since then has been handicapped by the lack of a firm and precise definition of money:

Therefore, one of the basic reforms proposed here in monetary policy is the reimposition of the pre-1980 interest prohibition on checkable deposits. This will induce a more-or-less automatic separation between the portion of NOW and ATS accounts which depositors consider investment accounts and those which are considered checkable ("money") transaction accounts, ultimately producing a smaller, "leaner" and more precise M1.

A second, related reform is the re-classification of checkable deposits as "money," in the same sense that currency is "money," rather than considering them as credit-claims on money.

The post-World-War II decline in the MDR provided a "new money equivalent" to an actual increase in the money stack, but with the much smaller magnitude of the MDR, it is unlikely that that will be available as such a substitute for new money in the future. Therefore, most money expansion in the future, unable to rely on further declines in the MDR, will have to be implemented directly through money creation by the Fed