“Sraffa’s criticisms of the concept of capital also amount – at least in principle –to a deadly blow to the foundations of the so-called ‘neo-classical synthesis’. Combining Keynes’ thesis on the possibility of fighting unemployment by adopting adequate fiscal and monetary policies with the marginalist tradition of simultaneous determination of equilibrium quantities and prices as a method to study any economic problem, this approach has in the last few decades come to constitute the dominant doctrine in textbooks the whole world over. It is only thanks to increasing specialisation in the various fields of economics, often invoked as the inevitable response to otherwise insoluble difficulties, that the theoreticians of general equilibrium are able to construct their models without considering the problem of relations with the real world that economists are supposed to be interpreting, and that the macroeconomists can pretend that their ‘one commodity models’ constitute an acceptable tool for analysis. For those who believe that the true task facing economists, hard as it may be, is to seek to interpret the world they live in, Sraffa’s ‘cultural revolution’ still marks out a path for research that may not (as yet) have yielded all it was hoped to, but is certainly worth pursuing.”

—  Alessandro Roncaglia

Source: Piero Sraffa: His life, thought and cultural heritage (2000), Ch. 1. Piero Sraffa

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Alessandro Roncaglia2
Italian economist 1947

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“Indeed, a full understanding of Sraffa’s contributions can be difficult, since these must be viewed as a complex whole, as part of an extremely ambitious cultural project: ‘to shunt the car of economic science’ in a direction opposite to that –the subjective theory of value –chosen by Jevons, one of the leading early exponents of the marginalist approach. Thus, with his writings Sraffa contributes to exposing the weak points in the theories of the leading exponents of the marginalist approach, from Alfred Marshall and Arthur Cecil Pigou to Friedrich von Hayek, and of their present-day followers, and at the same time re-proposes the classical approach of Adam Smith and David Ricardo (and also, in certain respects, of Karl Marx). The work of reconstructing the classical approach is also coherent with elements of the Keynesian contribution. This connection is possibly the most important issue in the current debate concerning the road to be followed in going on with the work started by Sraffa.”

Alessandro Roncaglia (1947) Italian economist

Introduction
Piero Sraffa: His life, thought and cultural heritage (2000)

“Balancing fiscal and monetary policies is a problem. If you do just one thing, it is not necessarily enough—neither monetary policy alone nor fiscal policy alone, and neither tax cuts nor expenditure increases alone. You need to mix policy. By having the right balance, you can get high employment and stable prices.”

Lawrence Klein (1920–2013) American economist

"Keynsianism Again: Interview with Lawrence Klein", Challenge (May-June 2001)

Ragnar Frisch photo

“An important object of the Journal should be the publication of papers dealing with attempts at statistical verification of the laws of economic theory, and further the publication of papers dealing with the purely abstract problems of quantitative economics, such as problems in the quantitative definition of the fundamental concepts of economics and problems in the theory of economic equilibrium.
The term equilibrium theory is here interpreted as including both the classical equilibrium theory proceeding on the lines of Walras, Pareto, and Marshall, and the more general equilibrium theory which is now beginning to grow out of the classical equilibrium theory, partly through the influence of the modern study of economic statistics. Taken in this broad sense the equilibrium problems include virtually all those fundamental problems of production, circulation, distribution and consumption, which can be made the object of a quantitative study. More precisely: The equilibrium theory in the sense here used is a body of doctrines that treats all these problems from a certain point of view, which is contrasted on one side with the verbal treatment of economic problems and on the other side with the purely empirical-statistical approach to economic problems”

Ragnar Frisch (1895–1973) Norwegian economist

Frisch (1927). as quoted in: Bjerkholt, Olav, and Duo Qin. A Dynamic Approach to Economic Theory: The Yale Lectures of Ragnar Frisch. Routledge, 2010: About "Oekonometrika"
1920

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“Hitler also anticipated modern economic policy... by recognizing that a rapid approach to full employment was only possible if it was combined with wage and price controls. That a nation oppressed by economic fear would respond to Hitler as Americans did to F. D. R. is not surprising.”

John Kenneth Galbraith (1908–2006) American economist and diplomat

As quoted in Adolf Hitler: The Definitive Biography (1991), by John Toland, also quoted in "Repatriation — The Dark Side of World War II (1995) by Jacob G. Hornberger http://www.fff.org/freedom/0795a.asp

“The equilibrium price level is determined at the point where the money market is in equilibrium. The temporary suspension of Walras' Law, far from making economic nonsense, thus appears as the crucial "trick" by which the tatonnement process is decomposed in two parts.
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Jürg Niehans (1919–2007) Swiss economist

Source: The theory of money, 1978, p. 12

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“Keynes's idea was very simple. Monetary and fiscal policy should have a single goal, jointly pursued, of maintaining a full employment level aggregate demand.”

Robert Skidelsky (1939) Economist and author

Source: John Maynard Keynes: The Return of the Master (2009), Ch. 8 : Keynes for Today

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“Communism forgets that life is individual. Capitalism forgets that life is social, and the kingdom of brotherhood is found neither in the thesis of communism nor the antithesis of capitalism but in a higher synthesis. It is found in a higher synthesis that combines the truths of both.”

Martin Luther King, Jr. (1929–1968) American clergyman, activist, and leader in the American Civil Rights Movement

1960s, Where Do We Go from Here: Chaos or Community? (1967)
Context: Communism forgets that life is individual. Capitalism forgets that life is social, and the kingdom of brotherhood is found neither in the thesis of communism nor the antithesis of capitalism but in a higher synthesis. It is found in a higher synthesis that combines the truths of both. Now, when I say question the whole society, it means ultimately coming to see that the problem of racism, the problem of exploitation, and the problem of war are all tied together. These are the triple evils that are interrelated.

“From Keynes' point of view the economic system, before the war failed in its solution of the unemployment problem”

Lawrence Klein (1920–2013) American economist

The Keynesian Revolution. Vol. 19. New York: Macmillan, 1947/66. p. 166

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“The world is not dialectical -- it is sworn to extremes, not to equilibrium, sworn to radical antagonism, not to reconciliation or synthesis. This is also the principle of evil.”

Jean Baudrillard (1929–2007) French sociologist and philosopher

Jean Baudrillard in: Eldon Taylor What Does That Mean?: Exploring Mind, Meaning, and Mysteries http://books.google.co.in/books?id=pTAIRTJbENgC&amp;pg=PA171, Hay House, Inc, 15 January 2010, p. 171 <br class="br">New millennium

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“[New classical economics] was the starting point for a rightward shift in economics that went against the idea that monetary policy can improve macroeconomic outcomes.”

Janet Yellen (1946) American economist and professor

The Hand on the Lever (2014)

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