IS-LM and MMT The core issue at the heart of debates between the heterodox Modern Monetary Theory (MMT) approach and more mainstream macroeconomics is how the financial economy and the real economy interact. As a consequence we see Keynesians of various hues attempting to illustrate their response to MMT with the standard orthodox Keynesian IS-LM model of the economy, which attempts to illustrate this interaction graphically.
The IS-LM model, as elaborated by various economists after Keynes, consists of upward and downward sloping curves in income (Y) and interest (r) space. (See Figure 1) The downward-sloping IS curve illustrates the inverse relationship between the cost of physical capital (summarised by r) and GDP (Y) where investment is assumed to be the major variable in the latter. The upward-sloping LM curve is a somewhat more complex concept but essentially proposes that given a fixed supply of money, a higher Y leads to a higher interest rate on bank deposits. This interest rate is assumed to feed through to the price demanded for financial capital in such a way that it can be considered as variable r for the purposes of the model. The model is thus somewhat vague in what r is really standing for. Further criticism is that a fixed supply of money is an unrealistic concept; the quantity of money supplied in a modern monetary economy being endogenous to its demand. It is also pointed out that the model mixes up stocks (of money) and flows (of income). Despite these criticisms, the IS-LM structure has been used to characterise MMT ideas in terms of the slopes of the two curves – in its extreme a vertical IS curve (implying investment as independent from any rate of interest) and a horizontal LM curve (implying a technically unlimited supply of money).
A Matching Flows Approach A better way of approaching the real/money interaction might be to work from the viewpoint of two linked flows – that of money and that of its exchange counterparts. We start off with the economy in a steady state, with constant flows of money on one side and of real goods and services and speculative assets on the other. (See Figure 2) There is no distinction between consumer goods and services and productive capital goods in this model, since this is regarded as an arbitrary distinction between goods that have a spectrum of durability and of the timing of flows of utility and/or monetary return. What we will distinguish are goods purchased for use, and those (speculative assets) purchased for resale at (expected) higher prices.
Ann Pettifor is a director of Prime Economics, which advocates for a more Keynesian view of macroeconomics, and has been involved in development and environmental economics for many years. In The Production of Money: How to Break the Power of the Bankers (Verso, 2017) she correctly identifies that ‘money enables us to do what we can within our limited natural and human resources’, and so ‘creates economic activity’ rather than being a result of it. It does this by creating the finance needed for productive employment and investment. Bank finance ensures that there is never a ‘shortage of money’ and so we are only limited by humanity’s capacity and the physical ecosystem. Yet when 95% of the money in existence has been created by the commercial banking system, whose aim (quoting Michael Hudson) ‘is not to minimise the cost of roads, electric power, transportation, water or education, but to maximise what can be charged as monopoly rent’, this power must be rigorously regulated. So much should be uncontroversial today and I have written about this here. Continue reading The Production of Money: How to Break the Power of Bankers – by Ann Pettifor→
Launched in 2009, and of wider interest since 2013, the ‘cryptocurrency’ Bitcoin has seen both a rise in its value in relation to existing national and supranational currencies, and in the discussion of its forming a partial or even complete replacement to those currencies. This article outlines the nature of Bitcoin and of traditional currencies and how they differ, and so examines the case for Bitcoin’s future acceptance and valuation.
The urtext of Bitcoin – the so called ‘White Paper’ by Satoshi Nakamoto – focuses on the reversibility of traditional electronic money transfers and how this necessitates banks as trusted third-parties in these transactions. The ‘cryptographic proof’ method of transferring bitcoins was devised initially to lock-in successive electronic transactions as part of a ‘blockchain’ of data, so as to eliminate the role of banks in preventing reversibility and double spending. In essence the collaborative use of computing power is used to verify the chronological order of transactions. The security and anonymity aspects of conducting transactions in this way is not the subject of this piece. The transactions thus carried out and recorded could be actually be denominated in any existing currency. Chains of such transactions would need to be closed by the transfer of that currency (physical or electronic) from the initial donor to the final recipient. Continue reading The Fragility of Bitcoin→
This is the first blog in a two-part series on ‘Bad Targets for Policy’. The second in the series will be on immigration.
We’ve seen a lot of focus on the ‘costing’ of policies in the parties’ manifestos for the forthcoming UK election. But we must remember that money is only a means of keeping account. Accounts are important but they are not reality. An account of debt is important, but it is not a physical reality. When a government has a debt in its own currency which only it (or its institutions) can issue, its obligations are important but not physically binding. They are not even legally binding, since the debt can be devalued virtually to zero by inflation. It follows that the real implications of government debt are not simply consequences of current government spending and taxation and the gap between them. Indeed these may be among the least important causes.
The real consequences of government debt result from the physical burden implied by the future obligation to transfer some control over a portion of real goods and services from the state to holders of the issued debt, either as interest or in repayment of capital. That debt in the nominal quantity of the national currency (the total amount in pounds or dollars say) is only a starting point. Inflation changes the relationship between that number and the obligation in real goods and services; the changing size of the national economy alters the ability to fulfill a fixed obligation. Continue reading Bad Targets for Policy 1: Government Debt→
Since the financial crisis of 2007-8, one suggested target reform has been the monetary system itself. This reform is based on the recognition that money in the modern economy is a rather peculiar phenomenon.
There are two popular conceptions of the nature of money, both of them incorrect. (Note that when we talk about money, it is entirely artificial to separate cash, in the form of bank notes and coin, from what we hold in bank accounts. To all effects and purposes, for the vast majority of us, they are the same and completely interchangeable.)
The first conception is that money is a fixed quantity determined by the government, which is either accepted by convention or because you can go to your bank and get a certain quantity of gold for it. (Presumably not many people have actually tried this!) The second is that banks can issue new money to lenders as a multiple of pre-existing deposits, depending on how often depositors demand cash. This is frequently referred to as ‘fractional reserve banking’. Continue reading A Banking Debate→
The authors of this report claim that ‘there has been a failure of government policy to decide the role banks should play, and therefore what sort of institutions they should be.’ and that ‘we have ended up with a banking system dominated by a small number of giant banks…’ These institutions are only able to survive because they are ‘too big to fail’, yet they offer poor customer choice and service, have acted illegally in rigging markets and indulge in ‘socially useless’ activities.
A Review of ‘Chasing Goldman Sachs: How the Masters of the Universe Melted Wall Street Down…and Why They’ll Take Us to the Brink Again’ by Suzanne McGee (2010, Crown Business)
This book is an excellent complement to the academic stuff I’ve read on the causes of the financial crisis. These latter accounts are very detailed in terms of ‘what’ happened but tend to be light on the ‘why’. ‘Chasing Goldman Sachs’ goes a long way to filling that gap.
The academic consensus view seems to be that driven by an increase in demand for safe places to save there was a huge increase in deposits held by financial institutions and collateralised by Asset-Backed Commercial Paper (ABCP). A significant proportion of this paper was comprised of securitised mortgages – many packaged in such a way that their quality was opaque. The toxicity of these was enhanced by dodgy ratings and shuffling to off-balance-sheet vehicles. When problems with some of these mortgages arose it took a while for holders of these ‘shadow-banking’ deposits to sort out whether or not their deposits were collateralised by bad assets or good ones. There was a panic and large-scale dumping of these deposits which led to loss of liquidity in the market for short-term interbank loans. Without these loans banks find it very difficult to balance their books at the end of each day as they are obliged to. (A good guide to all this from the academic point of view and to further more technical reading is at http://www.nber.org/papers/w17778.) Continue reading ‘Chasing Goldman Sachs’ by Suzanne McGee – A Review→
Understanding Money – a non-technical account of the essential role money and its creation plays in a modern economy. This article was previously available as a pdf, but I have now posted it as a blog in its own right. Since it was originally written in 2010, I have made a few revisions and additions.
Most of us have little idea of what money is and where it comes from. When we think of money, we think of bank-notes and coins. We know that most money is held in bank accounts, but even then we have an image (although most of us are probably aware that it isn’t quite an accurate image) of these notes and coins being held for us by the bank or lent out by the bank to make money for them (and hopefully us, if the money is held in an interest-bearing account). In fact the reality is about as far away from this as it is possible to imagine.
Of the total amount of money (adding together bank-notes and coin held by the general public and the value of all bank accounts in the UK), the bank-notes and coin make up only around 3% ! The reality is that the vast majority of all money exists only as a record held in someone’s name by some bank or other. How can this be? Where does this money come from? Where does it go? In this article I will attempt to answer these questions, and in doing so explain the benefits and the potential downside to our monetary system. Continue reading Understanding Money→
‘Aggregate Demand, Idle Time, and Unemployment’ – A Critique of Michaillat and Saez
Like all neoclassical models, that of Michaillat and Saez (2014) referred to in Simon Wren-Lewis’s Mainly Macro blog on 16th August fails to model money realistically. This renders their model incoherent and in any case incapable of encompassing one of the most important causes of unemployment: inadequate aggregate demand due to monetary factors.
The chief feature of their model is a product market in which matching is the mode of exchange. This produces costly frictions that lead output to apparently run ahead of consumption. To make sense of demand that does not automatically follow from income Michaillat and Saez introduce a ‘non-produced good’ which is endowed to every household. When households meet to exchange goods there is mutual trade of this non-produced good and households’ individually produced goods so as to optimise each household’s joint holding in utility terms. Michaillat and Saez ascribe a relative price p to the production good, which apparently becomes the absolute price when they determine the price of the non-produced good as 1. Since it is determined in equilibrium it is important that p is an absolute price, otherwise quantities of exchanges, production and labour demanded would be indeterminate in the model as they would also depend on the rate of exchange between the produced and non-produced goods. In fact it turns out that claiming p to be an absolute price is untenable. Continue reading Money and the Neo-classics… Again→
The causes of unemployment make it a moral issue. Radical solutions are required.
In an earlier post I noted some features of unemployment from a UK perspective. The main thrust was that a fairly constant proportion of the population in employment (around 72% of those of working-age) hides a serious decline in the availability of adequate work, due mainly to the increase in women in the workforce and the fall in the ratio of full-time to part-time work. In a paper I wrote and referenced here on welfare I hinted at a moral dimension to the issue of unemployment in a capitalist economy (by which I simply mean an economy where physical means of production tend to belong in more or less concentrated hands).
I have now written a rather more formal paper (pdf 198kb) which I presented to the Post-Keynesian Study Group annual workshop in May this year in which I expanded on why we have a persistent problem with unemployment, and why this has a significant moral implications in our attitude to the unemployed. In this light of this I review the inadequacy of current policy and look at some of the more radical solutions proffered. The following is a non-technical summary of the paper. Continue reading Unemployment – Morality, Money and Increasing Returns→