2 of 3 people found the following review helpful:
5.0 out of 5 stars
Modern macroeconomic interpretation of Keynes, May 5, 2010
This review is from: Expectations, Employment and Prices (Hardcover)
Roger Farmer constructs a new theory by merging Keynes's ideas into the modern macroeconomics framework. Keynes argued that the state of long term expectations determines the level of economic activity. Keynesian economics, however, lacks a microfoundation, which modern macroeconomics exploits. Farmer fills the gap and explores the role of Keynes's state of long term expectations to the macroeconomy in the language of dynamic general equilibrium theory. In Farmer's theory, this concept is represented by self-fulfilling beliefs on values of the capital good, and those beliefs select an equilibrium. As a consequence, it could be the case that high unemployment is an equilibrium phenomenon and persists for a long time due to market pessimism. This book is written in the style of academic economic research, and it contains Farmer's original and creative arguments and policy suggestions.
Help other customers find the most helpful reviews
Was this review helpful to you? Yes
No
4 of 10 people found the following review helpful:
3.0 out of 5 stars
No.Chapters 3 and 10 of the GT do not contain Keynes's microeconomic analysis of expectations.They are contained in chapter 20, April 5, 2010
This review is from: Expectations, Employment and Prices (Hardcover)
Farmer commits the exact same error that has been committed by practically every other economist ,in the 20th and 21st centuries ,who has written on Keynes's General Theory.The basic claim,first made by Richard Kahn and Joan Robinson ,was that Keynes provided no worked out technical,mathematical model of his theory of effective demand in the GT.This mistaken evaluation has resulted in an economics profession that,be it 1936 or 2006, believes that Keynes's "analysis" was contained in a chapter,chapter 3, that Keynes told Dennis Robertson in Febtuary,1935 DID NOT contain his analysis.
The theory of effective demand involved the D and Z functions .These functions were presented in a purely introductory manner in chapter 3 of the GT by Keynes. Keynes provided no microeconomic foundation in this chapter and/or worked out analysis.He warned th ereader that it might be unintelligible until the model was fully developed later in the book.Keynes made it very clear that he presented his formal, microeconomic analysis in chapter 20,not chapter 3 ,of the GT.This fact has never been understood by the economics profession .Together ,the D and Z functions specified the Aggregate Supply Curve( The Employment Function),which was a locus of multiple expected equilibria.
Farmer also accepts the basic claims made by the mathematically illiterate,inept,and innumerant English economist,Dennis Robertson,who insisted that chapters 3 and 10,respectively,contained Keynes's major contributions to microeconomics and macoeconomics,respectively, in the GT.
Consider the following assessment made by Farmer which makes the nature of his erroneous claims explicit :
" The theoretical foundations of this story have been discredited because Keynes did not construct a credible microfoundation to the theory of aggregate supply.In this chapter ,I use the search model developed earlier in this book to provide such a foundation ". (Farmer,2010,pp.81-82)
The second fundamental problem is Farmers's attempt to use probability distributions to deal with the question of uncertainty, as opposed to risk,where risk is usually modeled as the standard deviation of a normal(lognormal) probability distribution.Keynes's uncertainty concept is a function of his weight of the evidence (argument) variable,w,from the A Treatise on Probability.w is completely independent of any probability distribution.w is defined on the unit interval [0,1].w measures the completeness of the relevant evidence upon which the probabilities are being calculated.A w equal to 1 is requred before a particular probability distribution can be used.However,once w=1, there is no uncertainty,only risk.Farmer (pp.89-90) is very clear that he is ,like all neoclassical economists since Bentham,assuming that decision makers know the probability distribution or the odds.This means that there can be no uncertainty,only risk which is what Keynes completely rejected in the TP and the GT. The uncertaimty of the GT is a inverse function of w.Letting U equal uncertainty ,we obtain U=f(w).If w increases,U decreases while if w decreases,U increases.It is as simple and straightforward as that.A severe problem occurs because the economics profession is wedded to the subjective ,Bayesian ,personalist approach to probability,as specified in their Subjective Expected Utility (SEU)theory,that claims that there is no distinction between risk and uncertainty,since uncertainty and risk specify the same thing. The differences are fundamental.
Farmer needs to digest Pigou's 1933 model, contained in chapters 8-10 of Part II of his The Theory of Unemployment (TTOU,1933)if he ever wants to be able to digest Keynes's chapter 20 analysis.Chapter 21 of the GT is built on chapter 20.The appendix to chapter 19 of the GT then compares the models of TTOU and the GT.It is easy to see,by comparing the elasticity analysis of Keynes's chapter 21,pp.304-306, with Pigou's elasticity analysis, that Pigou only has one equilibrium while Keynes has many.
Farmer's book is interesting because he does succeed in duplicating some of Keynes's technical results while expressing them in the latest mathematical garb- window dressing that is currently taught in graduate level micro and macro courses in economics.
Help other customers find the most helpful reviews
Was this review helpful to you? Yes
No