2021年2月26日金曜日

Tobin 1963: Teaching macroeconomics students the facts – Bill Mitchell – Modern Monetary Theory

  10 IV. BANKS AND OTHER INTERMEDIARIES COMPARED In this respect the commercial banking industry is not qualitatively different from any other financial intermediary system. The same process limits the collective expansion of savings and loan associations, or savings banks, or life insurance companies. At some point the returns from addition- al loans or security holdings are not worth the cost of obtaining the funds from the public. There are of course some differences. First, it may well be true that commercial banks benefit from a la ger share of additions to private savings than other intermediaries. Second, according to modern American legal practice, commercial banks are subject to ceilings on the rates pay- able to their depositors--zero in the case of demand deposits. Unlike com- peting financial industries, co mmercial banks cannot seek funds by raising rates. They can and do offer other inducements to depositors, but these 11 substitutes for interest are imperfect and uneven in their incidence. In these circumstances the major read justment of the interest rate structure necessary to increase the relative demand for bank deposits is a decline in other rates. Note that neither of these differences has to do with the quality of bank deposits as "money." In a world without reserve requirements the preferences of depositors, as well as those of borrowers, would be very relevant in determining the volume of bank deposits. The volume of assets and liabilities of every intermediary, both nonbanks and banks, would be determined in a competi- tive equilibrium, where the rate of interest charged borrowers by each kind 11 - of institution just balances at the margin the rate of interest paid its creditors. Suppose that such an equilibrium is disturbed by a shift in preferences. At prevailing rates they decide to hold more savings savers accounts and other nonbank liabilities and less demand deposits. They transfer demand deposits to the credit of nonbank financial institutions, providing these intermediaries with the means to seek additional earning assets. These institutions, finding themselves able to attract more funds from the public even with some reduction in the rates they pay, offer better terms to borrowers and bid up the prices of existing earning assets. Consequently commercial banks release some earning assets--they no longer yield enough to pay the going rate on the banks' deposit liabilities. Bank deposits decline with bank assets. In effect, the nonbank inter- mediaries favored by the shift in public preferences simply swap the deposits transferred to them for a corresponding quantity of bank assets.

 V. FOUNTAIN PENS AND PRINTING PRESSES 
Evidently the fountain pens of commercial bankers are essentially different from the printing presses of governments. Confusion results from 12 concluding that because bank deposits are like currency in one respect-- both serve as media of exchange --they are like currency in every respect. Unlike governments, bankers cannot create means of payment to finance their own purchases of goods and services. Bank -created "money" is a liability, which must be matched on the other side of the balance sheet. And banks, as businesses, must earn money from their middlemen's role. Once created, printing press money cannot be extinguished, except by re- versal of the budget policies which led to its birth. The community 12 cannot get rid of its currency supply; the economy must adjust until it is willingly absorbed. The "hot potato" analogy truly applies. For bank- created money, however, there is an economic mechanism of extinction as well as creation, contraction as well as expansion. If bank deposits are excessive relative to public preferences, they will tend to decline; other- wise banks will lose money. The burden of adaptation is not placed entirely on the rest of the economy. VI. THE ROLE OF RESERVE REQUIREMENTS Without reserve requirements, expansion of credit and deposits by the commercial banking system would be limited by the availability of assets at yields sufficient to compensate banks for the costs of attracting and hold- ing the corresponding deposits. In a regime of reserve requirements, the limit which they impose normally cuts the expansion short of this competi- tive equilibrium. When reserve requirements and deposit interest rate ceilings are effective, the marginal yield of bank loans and investments exceeds the marginal cost of deposits to the banking system. In these сir- cumstances additional reserves make it possible and profitable for banks to acquire additional earning assets. The expansion process lowers interest rates generally--enough to induce the public to hold additional deposits but ordinarily not enough to wipe out the banks' margin between the value and cost of additional deposits. It is the existence of this margin--not the monetary nature of bank liabilities--which makes it possible for the economics teacher to say that additional loans permitted by new reserves will generate their own deposits.
  IV. 銀行と他の金融仲介システムの比較 
この点で、商業銀行業界は他の金融仲介システムと質的に異なるものではない。貯蓄貸付組合や貯蓄銀行、生命保険会社の集団的な拡大は、同じプロセスによって制限される。ある時点では、追加融資や証券保有からのリターンは、公的資金を得るためのコストに見合わない。もちろん、いくつかの違いがある。第一に、商業銀行が他の仲介業者よりも民間貯蓄への追加融資のシェアが高いことは事実であろう。第二に、現代のアメリカの法律慣行によれば、商業銀行は預金者に支払うことができる金利に上限を設けられている(デマンド預金の場合はゼロ)。コマーシャル・バンクは、他の金融業界とは異なり、金利を引き上げることで資金を調達することはできない。コマーシャル・バンクは、預金者に他の誘因を提供することは可能であり、また、提供することも可能であるが、これらの利息の代用品は、不完全であり、その発生率にもばらつきがある。このような状況下では、銀行預金の相対的な需要を高めるために必要な金利構造の主要な読み解き方は、他の金利の低下である。これらの違いは、いずれも「貨幣」としての銀行預金の質とは無関係であることに注意が必要である。準備義務のない世界では、預金者の選好と借り手の選好は、銀行預金の量を決定する上で非常に重要である。ノンバンクと銀行の両方を含むすべての仲介機関の資産と負債の量は、競争的な均衡の中で決定されるであろう。このような均衡が選好のシフトによって乱されていると仮定します。実勢金利では、彼らはより多くの貯蓄貯蓄貯蓄口座と他の非銀行負債と少ない需要預金を保持することにしました。彼らは、需要預金をノンバンクの金融機関の信用に移し、これらの仲介機関に追加の収益資産を求める手段を提供する。これらの金融機関は、支払金利を多少引き下げても国民からより多くの資金を集めることができることを知り、借り手により良い条件を提示し、既存の収益資産の価格を値上げする。その結果、商業銀行は収益資産の一部を手放すことになる。銀行預金は銀行資産とともに減少する。実質的には、国民の嗜好の変化によって好まれたノンバンク・インターメディ アは、単に銀行に譲渡された預金を、対応する量の銀行資産と交換しているだけなのである。

万年筆と印刷機 
商業銀行員の万年筆は、明らかに政府の印刷機とは本質的に異なる。銀行預金は、ある点では通貨と同じであり、両者とも交換媒体としての役割を果たしているため、あらゆる点で通貨と同じであると結論づけているため、混乱が生じている。政府とは異なり、銀行員は自分たちの商品やサービスの購入資金を調達するための支払手段を作ることはできない。銀行が作成した「お金」は負債であり、貸借対照表の反対側で相殺されなければなりません。そして、銀行は、ビジネスとして、仲買人の役割からお金を稼がなければならない。一度作られた印刷機マネーは、その誕生につながった予算政策の見直しをしない限り、消滅させることはできない。地域社会の



 V. 登山用ペンと印刷用プレス 
商業銀行家の万年筆は、明らかに政府の印刷機とは本質的に異なる。銀行預金は、ある点では通貨と同じであり、両者とも交換媒体としての役割を果たしているため、あらゆる点で通貨と同じであると結論づけているため、混乱が生じている。政府とは異なり、銀行員は自分たちの商品やサービスの購入資金を調達するための支払手段を作ることはできない。銀行が作成した「お金」は負債であり、貸借対照表の反対側で相殺されなければなりません。そして、銀行は、ビジネスとして、仲買人の役割からお金を稼がなければならない。一度作られた印刷機マネーは、その誕生のきっかけとなった予算政策の見直しをしない限り、消滅させることはできない。コミュニティは、その通貨供給を取り除くことはできない。まさに「ホットポテト」の例えが当てはまる。しかし、銀行が作った貨幣には、創造と同様に消滅、収縮と拡大の経済メカニズムがある。もし銀行の預金が国民の嗜好に比べて過剰であれば、銀行の預金は減少する傾向にあり、そうでなければ賢明な銀行は資金を失うことになる。適応の負担は、経済の他の部分に完全に課せられているわけではない。

VI. 準備義務の役割 

準備義務がなければ、商業銀行システムによる信用と預金の拡大は、対応する預金を誘致し、保持するためのコストを銀行に補償するのに十分な利回りでの資産の可用性によって制限されるだろう。準備義務の体制では、準備義務が課す制限は、通常、この競争力のある均衡を下回る拡大を抑制する。準備要件と預金金利の上限が有効な場合、銀行の融資と投資の限界利回りは、銀行システムに対する預金の限界コストを上回る。このような状況下では、追加の準備金があれば、銀行は収益資産を追加で獲得することが可能となり、利益を得ることができる。預金拡大の過程では、一般的に金利が低下し、国民が追加の預金を保有するように誘導するには十分であるが、通常は、追加の預金の価値とコストの間にある銀行のマージンを払拭するには十分ではない。このマージンの存在こそが、銀行の負債の貨幣性ではなく、経済学の先生が、新たな準備金によって認められた追加融資が自分たちの預金を生み出すと言うことを可能にしているのである。


Teaching macroeconomics students the facts – Bill Mitchell – Modern Monetary Theory
Tobin 1963

Teaching macroeconomics students the facts

Yesterday, I was walking over to the library and I ran into an old colleague who has been dragooned back into teaching macroeconomics on a casual basis. The person was telling me that they were dreading taking the class next week because the topic was banking and the relationship between reserves and the money supply. Accordingly, the person said the chapter in the textbook specified by the lecturer-in-charge was about the money multiplier. The person I met is familiar and sympathetic to Modern Monetary Theory (MMT) and posed the question "how can I do it?". My answer was that students deserved better and that the lecture should develop the multiplier from a critical perspective so that students know about it but realise how far-fetched it is as a depiction of how the banking system actually operates.

As background, I should add that I am no longer associated with the teaching faculty at the University and hold a research chair outside of the teaching and faculty structure. The research centre I direct is within the Research Division of the University. Soon after I left what was then the Economics Department, the neo-liberal managerial onslaught that is rife within Australian universities collapsed the economics discipline into a business school and wiped out a lot of the "social science" component of the program. The strongly Modern Monetary Theory (MMT) and Post Keynesian teaching emphasis of the past has been largely lost and those in charge of teaching macroeconomics here are mostly mainstream (using Dornbusch of all things as the textbook – its about as bad as Mankiw!). It is a very sad outcome for students.

Anyway, I also mentioned to the person that I had just that morning been reading a rarely cited 1963 paper Commercial Banks as Creators of "Money" – by Nobel Prize winning economist (the late) James Tobin. I had read it a long-time ago while I was doing my PhD and was alerted to it again by one of the regular billy blog readers (thanks Jeff).

The article considers the money multiplier by juxtaposing the "Old View" and the "New View" of banking. I went back into my database to see the notes I took when I read the article originally (in 1983!). It is quite amazing that articles like this get lost in the mainstream literature. Despite obvious flaws they categorically demonstrate that the material that is presented in macroeconomics textbooks and which students subsequently take away from their studies as "truth" is typically misleading and often totally wrong.

Tobin begins:

Perhaps the greatest moment of triumph for the elementary economics teacher is his exposition of the multiple creation of bank and credit deposits. Before the admiring eyes of freshmen he puts to rout the practical banker who is so sure he "lends only the money depositors entrust to him." … [in fact] … depositors entrust to bankers whatever amounts the bankers lend … [for] … the banking system as a whole …. a long line of financial heretics have been right in speaking of "fountain pen money" – money created by the stroke of the bank president's pen when he approves a loan and credits the proceeds to the borrower's checking account.

In the blog – Money multiplier and other myths – I provide an elementary account of the money multiplier that is taught to students. This is a central mainstream concept which underpins its view that inflation results from budget deficits and that the central bank can control the money supply.

The mainstream macroeconomics textbooks tell students that monetary policy describes the processes by which the central bank determines the money supply. In Mankiw's Principles of Economics (Chapter 27 First Edition) he says that the central bank has "two related jobs". The first is to "regulate the banks and ensure the health of the financial system" and the second "and more important job":

… is to control the quantity of money that is made available to the economy, called the money supply. Decisions by policymakers concerning the money supply constitute monetary policy (emphasis in original).

They link this alleged capacity to control the money supply to inflation via the belief in the now-discredited but still prominent Quantity Theory of Money.

Textbooks like that of Mankiw mislead their students into thinking that there is a direct relationship between the monetary base and the money supply. They claim that the central bank "controls the money supply by buying and selling government bonds in open-market operations" and that the private banks then create multiples of the base via credit-creation.

Students are familiar with the pages of textbook space wasted on explaining the erroneous concept of the money multiplier where a banks are alleged (according to Mankiw) to "loan out some of its reserves and create money". As I have indicated several times the depiction of the fractional reserve-money multiplier process in textbooks like Mankiw exemplifies the mainstream misunderstanding of banking operations.

Allegedly, the money multiplier m transmits changes in the so-called monetary base (MB) (the sum of bank reserves and currency at issue) into changes in the money supply (M).

Students then labour through algebra of varying complexity depending on their level of study (they get bombarded with this nonsense several times throughout a typical economics degree) to derive the m, which is most simply expressed as the inverse of the required reserve ratio.

So if the central bank told private banks that they had to keep 10 per cent of total deposits as reserves then the required reserve ratio (RRR) would be 0.10 and m would equal 1/0.10 = 10. More complicated formulae are derived when you consider that people also will want to hold some of their deposits as cash. But these complications do not add anything to the story.

The formula for the determination of the money supply is: M = m x MB. So if a $1 is newly deposited in a bank, the money supply will rise (be multiplied) by $10 (if the RRR = 0.10). The way this multiplier is alleged to work is explained as follows (assuming the bank is required to hold 10 per cent of all deposits as reserves):

  • A person deposits say $100 in a bank.
  • To make money, the bank then loans the remaining $90 to a customer.
  • They spend the money and the recipient of the funds deposits it with their bank.
  • That bank then lends 0.9 times $90 = $81 (keeping 0.10 in reserve as required).
  • And so on until the loans become so small that they dissolve to zero

The following table shows you what the pattern involved is. The results are self-explanatory. In this particular case, I have shown only 20 sequences. In fact, this example would resolve at around 94 iterations where the successive loans, then fractional deposits get smaller and smaller and eventually become zero.

money_multiplier_table

The conception of the money multiplier is really as simple as that. But while simple it is also wrong to the core! What it implies is that banks first of all take deposits to get funds which they can then on-lend. But prudential regulations require they keep a little in reserve. So we get this credit creation process ballooning out due to the fractional reserve requirements.

That is nothing like the way the banking system operates in the real world. The idea that the monetary base (the sum of bank reserves and currency) leads to a change in the money supply via some multiple is not a valid representation of the way the monetary system operates even though it appears in all mainstream macroeconomics textbooks and is relentlessly rammed down the throats of unsuspecting economic students.

The money multiplier myth leads students to think that as the central bank can control the monetary base then it can control the money supply. Further, given that inflation is allegedly the result of the money supply growing too fast then the blame is sheeted home to the "government".

This leads to claims that if the government runs a budget deficit then it has to issue bonds to avoid causing hyperinflation. Nothing could be further from the truth.

Further, the central bank does not have the capacity to control the money supply in a modern monetary system. In the world we live in, bank loans create deposits and are made without reference to the reserve positions of the banks. The bank then ensures its reserve positions are legally compliant as a separate process knowing that it can always get the reserves from the central bank. The only way that the central bank can influence credit creation in this setting is via the price of the reserves it provides on demand to the commercial banks.

Tobin clearly knew this in 1963. After presenting the mainstream view of the money multiplier he said:

The foregoing is admittedly a caricature, but I believe it is not a great exaggeration of the impressions conveyed by economics teaching concerning the role of commercial banks … in the monetary system. In conveying this melange of propositions, economics has replace the naive fallacy of composition of the banker with other half-truths perhaps equally misleading.

Tobin then argues that this old way of thinking – which links the behaviour of the financial and monetary institutions with the real economy – ultimately via the Quantity Theory of Money – is inferior to a "new view" which is more ground in the world of the "practical banker". The new view:

tends to blur the sharp traditional distinctions between money and other assets and between commercial banks and other financial intermediaries; to focus on demands for and supplies of the whole spectrum of assets rather than on the quantity and velocity of "money"; and to regard the structure of interest rates, asset yields, and credit availabilities rather than the quantity of money as the linkage between monetary and financial institutions and the policies on the one hand and the real economy on the other.

So financial intermediaries including banks aim to bring together borrowers "who wish to expand their holdings of real assets … beyond the limits of their own net worth" and lenders "who wish to hold part or all of their net worth in assets of stable monetary value with negligible risk of default". The assets of the banks are the obligations of the borrowers (loans etc) while the liabilities are the assets of the lenders (deposits etc).

Interestingly – and gold bugs take note – Tobin says that:

Neither individually nor collectively do commercial banks possess a widow's cruse. Quite apart from legal reserve requirements, commercial banks are limited in scale by the same kinds of economic processes that determine the size of other intermediaries.

The way banks actually operate is to seek to attract credit-worthy customers to which they can loan funds to and thereby make profit. What constitutes credit-worthiness varies over the business cycle and so lending standards become more lax at boom times as banks chase market share.

So there is a limit on bank lending imposed by the opportunities to profit and the availability of credit-worthy customers.

His Section V entitled – Fountain Pens and Printing Presses is especially interesting although I would use different terminology (especially with respect to the "printing press" characterisation).

Tobin says:

Evidently the fountain pens of commercial bankers are essentially different from the printing presses of governments. Confusion results from concluding that because bank deposits are like currency in one respect – both serve as media of exchange – they are like currency in every respect. Unlike governments, bankers cannot create means of payment to finance their own purchases of goods and services. Bank-created "money" is a liability, which must be matched on the other side of the balance sheet.

This goes to the heart of the difference between vertical and horizontal transactions which define the relationship, in the first instance (vertical), between the government and non-government sector and, in the second instance (horizontal) between transactors within the non-government sector.

I cover these concepts in some detail in the suite of blogs – Deficit spending 101 – Part 1 – Deficit spending 101 – Part 2 – Deficit spending 101 – Part 3.

The following diagram is taken from Deficit spending 101 – Part 3 and allows you to understand the difference between vertical and horizontal transactions within a modern monetary system.

In terms of the vertical transactions between the government and non-government sector, the tax liability is characterised as being at the bottom of the vertical, exogenous, component of the currency. The consolidated government sector (the Treasury and RBA) is at the top of the vertical chain because it is the sole issuer of currency.

The middle section of the graph is occupied by the private (non-government) sector. It exchanges goods and services for the currency units of the state, pays taxes, and accumulates the residual (which is in an accounting sense the federal deficit spending) in the form of cash in circulation, reserves (bank balances held by the commercial banks at the central bank) or government (Treasury) bonds or securities (deposits; offered by the central bank).

The currency units used for the payment of taxes are consumed (destroyed) in the process of payment. Given the national government can issue paper currency units or accounting information at the central bank at will, tax payments do not provide the state with any additional capacity (reflux) to spend.

The two arms of government (treasury and central bank) have an impact on the stock of accumulated financial assets in the non-government sector and the composition of the assets. The government deficit (treasury operation) determines the cumulative stock of financial assets in the private sector. Central bank decisions then determine the composition of this stock in terms of notes and coins (cash), bank reserves (clearing balances) and government bonds.

Tobin says in this regard:

Once created, printing press money cannot be extinguished, except by reversal of the budget policies which led to its birth. The community cannot get rid of its currency supply; the economy must adjust until it is willingly absorbed. The "hot potato" analogy truly applies.

To further understand what happens at the macro level he observes that the "preferences of the public normally play no role in determining the total volume of deposits or the total quantity of money. For it is the beginning of wisdom in monetary economics to observe that money is like the "hot potato" of a children's game: one individual may pass it to another, but the group as a whole cannot get rid of it. This is as true, evidently, of money created by banker's fountain pens as of money created by public printing presses.

But the important point is that portfolio preferences may be disturbed when, for example, a budget deficit adds bank reserves (high powered money) to the non-government sector. Economic adjustments then occur to resolve the desires of the private sector to hold different financial assets according to their yields and risks.

The diagram shows how the cumulative stock is held in what we term the Non-government Tin Shed which stores fiat currency stocks, bank reserves and government bonds. I invented this Tin Shed analogy to disabuse the public of the notion that somewhere within a nation there is a store where the national government puts its surpluses away for later use. There is actually no storage (that is, saving) because when a surplus is run, the purchasing power is destroyed forever. However, the non-government sector certainly does have a Tin Shed within the banking system and elsewhere.

Any payment flows from the Government sector to the Non-government sector that do not finance the taxation liabilities remain in the Non-government sector as cash, reserves or bonds. So we can understand any storage of financial assets in the Tin Shed as being the reflection of the cumulative budget deficits.

Taxes are at the bottom of the exogenous vertical chain and go to rubbish, which emphasises that they do not finance anything. While taxes reduce balances in private sector bank accounts, the Government doesn't actually get anything – the reductions are accounted for but go nowhere. Thus the concept of a fiat-issuing Government saving in its own currency is of no relevance.

Finally, payments for bond sales are also accounted for as a drain on liquidity but then also scrapped.

The US government regularly trashes US currency notes that it collects as taxes which suggests that the "revenue" goes into the trash bin rather than is used to underpin spending!

As an aside, in the following news story you learn that the revenue also might go into recycled paper and cardboard products. The US Government was looking green in 1912!

My friend and some-time co-author Randy Wray sent me a link to a photo the other day. I did some further research and determined that the photo was part of the famous Harris and Ewing Inc. collection which was donated to the US Library of Congress in 1955.

The photo appeared in an article published by the Washington Post on June 2, 1912 and it shows officials from the "US Treasury Department, Bureau of Printing and Engraving. Destruction Committee" destroying old US currency notes. The woman is one Mrs. Louise Lester who was apparently "in charge of mutilation" and the only woman to have served in this role up to that point in history.

Here is the image from the original Washington Post story from 1912. If you want to see a clearer image of the original photo used in the story then click the photo.

Anyway, back to the story.

The private credit markets represent relationships (depicted by horizontal arrows) and house the leveraging of credit activity by commercial banks, business firms, and households (including foreigners), which many economists in the Post Keynesian tradition consider to be endogenous circuits of money. The crucial distinction is that the horizontal transactions do not create net financial assets – all assets created are matched by a liability of equivalent magnitude so all transactions net to zero.

This is the sense that Tobin says that every banking asset is matched by an offsetting liability. While the non-government sector cannot create or destroy net financial assets denominated in the currency of issue, Tobin says of "bank-created money" that:

… there is an economic mechanism of extinction as well as creation, contraction as well as expansion. If bank deposits are excessive relative to public preferences, they will tend to decline; otherwise banks will lose income. The burden of adaption is not placed entirely on the rest of the economy.

So when a loan is paid off the liability and asset is extinguished and the broad measure of the "money supply" shrinks. However, transactions within the non-government cannot reduce the level of bank reserves. They can redistribute them but not alter the net cash position of the economy. Only vertical transactions can change the net cash position.

Tobin then considers the textbook treatment of monetary expansion. He says that according to this mainstream view, "additional reserves make it possible and profitable for banks to acquire additional earning assets. The expansion process lowers interest rates generally – enough to induce the public to hold additional deposits but … not enough to wipe out the banks' margin between the value and cost of additional deposits."

He concludes:

But the textbook description of multiple expansion of credit and deposits on a given reserve base is misleading even for a regime of reserve requirements. There is more to the determination of the volume of bank deposits than the arithmetic of reserve supplies and reserve ratios. The redundant reserves of the thirties are a dramatic reminder that economic opportunities sometimes prevail over reserve calculations.

Again, the terminology is mainstream. But the importance of this point is that it undermines the notion that reserves are loaned on a fractional basis and are thus "multiplied" into the money supply.

What determines banks' willingness to extend loans is not the volume of reserves in the system but rather the demand by credit-worthy borrowers ("economic opportunities") who the banks' estimate will deliver a risk-tolerant return on their capital.

In relation to the diagram above, private leveraging activity, which nets to zero, is not an operative part of the "Tin Shed" stores of currency, reserves or government bonds. The commercial banks do not need reserves to generate credit, contrary to the popular representation in standard textbooks.

Tobin continued to argue that the mainstream textbook approach dismissed the 1930s build-up of "redundant reserves" (while the broader money aggregates collapsed) "simply as an aberration from the normal state of affairs in which banks are fully 'loaned up' and total deposits are linked to the volume of reserves".

The same point is being made in the current period after the rather dramatic balance sheet expansions of the central banks via quantitative easing. The broad money aggregates are static or shrinking yet the major central banks are holding massive increases in bank reserves.

Tobin correctly says:

The thirties exemplify in extreme form a phenomenon which is always in some degree present … An individual bank is not constrained by any fixed quantum of reserves. It can obtain additional reserves to meet requirements by borrowing from the Federal Reserve, by buying "Federal Funds" from other banks, by selling or 'running off' short-term securities. In short, reserves are available at the discount window and in the money market, at a price. This cost the bank must compare with available yields on loans and investments. If those yields are low relative to the cost of reserves, the bank will seek to avoid borrowing reserves and perhaps hold excess reserves instead. If those yields are high relative to the cost of borrowing reserves, the banks will shun excess reserves and borrow reserves occasionally or even regularly.

Thus, the extent to which the central bank supply of reserves is used "depends on the economic circumstances confronting the banks – on available lending opportunities and on the whole structure of interest rates from the Fed's discount rate through the rates on mortgages and long-term securities."

The upshot of these insights is that there is a "much looser linkage between reserves and deposits than is suggested by the textbook exposition of multiple expansion for a system which is always precisely and fully 'loaned up'".

So Tobin clearly understood that a growth in the supply of reserves will not necessarily be related in any particular way to the growth in broader monetary aggregates, as is assumed by the mainstream and taught day-in-day-out to students studying macroeconomics.

He also notes that "loans and deposits will expand by less than their textbook multiples" because the "open-market operations which bring about the increased supply of reserves tend to lower interest rates" which "diminish the incentives of banks to keep fully loaned up or to borrow reserves".

Please read the following blogs – Building bank reserves will not expand credit and Building bank reserves is not inflationary – for further discussion.

So the way the monetary system actually works is that bank reserves are not required to make loans and there is no monetary multiplier mechanism at work as described in the text books.

Loans create deposits which can then be drawn upon by the borrower. No reserves are needed at that stage. The loan desk of commercial banks has no interaction with the reserve management desk as part of their daily tasks. They just take applications from credit worthy customers who seek loans and assess them accordingly and then approve or reject the loans. In approving a loan they instantly create a deposit.

The only thing that constrains the bank loan desks from expanding credit is a lack of credit-worthy applicants, which can originate from the supply side if banks adopt pessimistic assessments or the demand side if credit-worthy customers are loathe to seek loans.

It is also possible that the price that the central bank sets at the discount window may influence the profitability of certain loan opportunities for banks and curtail lending.

Conclusion

I hope my former colleague, who I bumped into yesterday, doesn't follow the textbook and force the monetary multiplier as presented onto the students. I hope that instead, the students are exposed to the concept as a classic example of the way the mainstream profession misleads the students.

I also hope that by the end of the lecture they are thoroughly dis-abused of the concept.

I also hope that my former colleague then traces out how the mainstream uses these erroneous concepts to mount ideological attacks on governments and force them to introduce macroeconomic policy settings that are not consistent with the pursuit of public purpose. Specifically, I hope the students realise after the lecture that the claims that budget deficits will lead to hyperinflation if the government stopped placing debt into the private markets when they net spend are totally without theoretical foundation.

Saturday Quiz

The Saturday Quiz will be back sometime tomorrow – even harder than last week!

That is enough for today!



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