Neorational Keynesonomics

Continuing from the previous post, chapter 4 of Lekachman’s The Age of Keynes is entitled “The General Theory,” and comprises a terse outline of the major ideas and critiques presented in Keynes’s General Theory.  Like Chapter 3, and I can only assume this is true for the rest Lekachman’s book, it is quite accessible and well-written.  I picked up a copy of The General Theorya few days ago for about eight bucks, and after reading about 18 pages over the course of two days, I can attest to Lekachman’s statement that the book is “…a difficult, technical treatise…”  Still, it is manageable with careful reading and a bit of knowledge of Keynes’s intellectual forbears.

The full title of the book is The General Theory of Employment, Interest, and Money, and it tackles in turn each of these matters and seeks a way to tie them together.  Keynes work was motivated by the failures of classical postulates to account for any economic state that did not exhibit full employment; hence his belief that classical economics, rather, was a special case of a more “general theory” which accounted for the possibility of any number of equilibria where employment was less than full.  He first sets out to call Say’s Law (”Supply creates its own demand”) into question; supply was only one part of the story.  It becomes necessary to define an aggregate demand, independent from aggregate supply (at least in the short-run which is all that with which Keynes concerns himself; keep that in mind as you read on).  Aggregate demand for wage-goods - those products demanded for consumption by wage earners - is determined primarily by income.  If a rise in the price of wage-goods relative to wages - which would increase the marginal product of labor, thus giving producers the incentive to hire more labor, and which would increase the level of income desired by both workers and the unemployed - causes both a shift in the aggregate supply of labour and in the aggregate demand for labour, then it can not be said that the economy is currently at full employment.  But then this offers one a way out of an equilibrium of less-than-full employment: increase aggregate demand.  How to do this?  Increase income.  How to increase income?  Public works funded with deficit spending. 

Keynes’s conclusion on this point arises from his observation that classical economics committed a logical fallacy by assuming that if it behooves one firm to lower the wages it must pay, it must thereby behoove all firms to do so. Yet this is incorrect, since lower wages across the board reduce income, thereby reducing aggregate demand, and therefore leading to an equilibrium level of employment below full.  It strikes me that Keynes’s analysis here implicitly assumes that markets are imperfectly competitive, and that wage earners are wage takers, and not on an equal footing with the employer in the wage-bargaining process.  Indeed, I think this becomes fairly clear in the first 18 pages of his book, and it would seem to jive with Keynes’s populist/Labour Party tendencies that Lekachman evokes in chapter 3. 

Another piece of Keynes’s system was his discussion of investment.  Here Keynes seems to reduce investment decisions to a rather unsatisfactory set of notions about investor moroseness or exuberance about the potential or actual marginal efficiency of capital on which investment dollars are spent.  The beneficent state, by taking some control over the investment reins, might stabilize the environment, allowing for more predictable outcomes to investment.  Under the assumption that investment decisions are so loosely and unscientifically determined, then only large interest rate changes will have an appreciable effect in one direction or another on investment.  I’m not a big fan of this point, if it is indeed as unsubstantiated as Lekachman seems to characterize it. 

I’m not perfectly clear on this, but there seems to be an alternative framework for investment.  Keynes apparently rejects the classical idea of a savings/investment equilibrium determined by calculations of time preferences, marginal efficiencies of capital, etc.,  which in turn determine an equilibrium interest rate.  For savings, he seems to think that it is determined not by time preference but by liquidity preference as well as the interest rate.  Money held in stock for a variety of reasons was not by any means saved, and so had nothing to do with determining the interest rate.  Instead, it was speculators, focused solely on the expected rise and fall of securities’ prices, which made predictions of and thereby determined the interest rate; in other words, interest rates are self-fulfilling prophecies.  When equities prices fall then the potential yield (the interest rate) on that equity must rise, since a marginal increase in the equity’s value will be a larger percentage rise at a lower price than at a higher price.  The corollary is also true.  Says Lekachman:  “…the rate of interest is indeed a premium, but a premium paid for surrendering cash, the perfectly liquid asset, for securities, imperfectly liquid assets.”  

But if investors expect interest rates to rise and thereby divest themselves, then the government can step in and purchase securities to hold interest rates down.  This is precisely what open market operations, performed by central banks, achieve.  Furthermore, it is well within the purview of public policy to smooth the movement of interest rates and prevent large fluctuations.  Here is yet another entrance for the public sector to perform in various and sundry ways to regulate the private.  The multiplier process discussed in chapter three (see previous post) suggests that small changes in investment will lead in turn to large increases in consumption (aggregate demand) and therefore monetary and fiscal policy both are viable means for the government to intervene and bring an economy out of an equilibrium of less-than-full employment.

I hope have that I have done justice to a single chapter that attempts to do justice to an entire book.  He was a bright guy, this Mr. Keynes, but I see some of those flaws upon which others would fixate in hindsight, and I’m looking forward to reading those critiques and seeing it culminate in a resurrection of classical thought.   

Source:  Lekachman, Robert.  The Age of Keynes.  Chapter 4.  New York:  Random House, 1966.   

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