“Part of the downfall came early and on theoretical grounds, with the realization that real-world information lags for aggregate variables like the price level and money supply were much too short to rationalize the persistent multiyear deviations from equilibrium that seemed to characterize business cycles in most industrialized countries. The second dubious assumption, continuous market clearing, was viewed more critically once it was recognized that it was not an inextricable concomitant of rational expectations, especially when Stanley Fischer (1977) and Edmund Phelps and John Taylor (1977) showed that rational expectations could be embedded in a model containing real-world institutional features like multiperiod wage and price contracts to generate nonmarket-clearing behavior. Once Fischer and Phelps-Taylor had shown that rational expectations by itself was a necessary but not a sufficient condition to validate new-classical policy conclusions, the race was on to develop the new-Keynesian theory based on rational expectations and one or another institutional impediment to continuous market clearing.”

—  Robert J. Gordon

"Fresh Water, Salt Water, and other Macroeconomic Elixirs", 1989

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American economist 1940

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“Since the late 1960s macroeconomic debates in the United States have centered on the competing interpretations of the new classical and new Keynesian macroeconomics. The initial new classical model developed in the early 1970s by Robert E. Lucas, Jr., combined market-clearing, imperfect information, and rational expectations. After much testing, it was eventually rejected in the late 1970s for failing to explain why business cycles lasted on average four years while information delays lasted only a few weeks. It was soon replaced by a second new classical approach, the Real Business Cycle (RBC) model, which was also based on continuous market clearing and competitive equilibrium, but now generated the business cycle through serially correlated procyclical technology shocks.”

Robert J. Gordon (1940) American economist

Robert J. Gordon, Are Procyclical Productivity Fluctuations a Figment of Measurement Error? (1992).

“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.
This analysis confirms that for a neoclassical general equilibrium system with neutral money there is indeed a consistent decomposition procedure, based on appropriate compensation principles, permitting the determination of real variables in the real sector while the price level is determined in the monetary sector. However, the amount of intellectual effort which, in the wake of Lange and Patinkin, was devoted to this issue, is entirely out of proportion to its economic significance. The real economic question is not whether a system can be dichotomized, but whether money is neutral.”

Jürg Niehans (1919–2007) Swiss economist

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

“The original Lucas version of the new-classical macroeconomics combined the undeniable appeal of rational expectations with two more dubious assumptions inherited from Friedman (1968), that is, continuous market clearing and imperfect information, to form the foundation of the famous “Lucas supply function” (more justly, the Friedman-Lucas supply function). Soon Sargent and Wallace (1975) extracted from Lucas’s model its implication for monetary policy, the famous “policy-ineffectiveness proposition.” The demonstration by Barro (1977) that one could interpret historical U. S. data to be consistent with the proposition and the theory brought new-classical economics to its shortlived period of peak influence.”

Robert J. Gordon (1940) American economist

"Fresh Water, Salt Water, and other Macroeconomic Elixirs", 1989

“Much time was wasted and ink spilled in the late 1960s and early 1970s trying to interpret the lagged effect of prices on wages as reflecting adaptive lags in the formation of expectations. But if we have learned anything from the new Keynesian economics of Fischer, Taylor, Blanchard, and their younger followers, it is that price and wage inertia is compatible with rational expectations.”

Robert J. Gordon (1940) American economist

Robert J. Gordon, The Phillips Curve Now and Then. (1990).

“Business-cycle theorists concerned themselves with why the economy naturally generated fluctuations in employment and output, [while the rest of the profession] continued to operate on the assumption that full employment was the natural, equilibrium position for the economy.”

Robert Aaron Gordon (1908–1978) American economist

Source: Business Fluctuations (1952), p. 340; as cited in: Thomas Cate (2013), An Encyclopedia of Keynesian Economics, Second edition. p. 347

James Tobin photo

“Keynes did not challenge the efficacy of price adjustment mechanisms in clearing particular markets in the Marshallian partial equilibrium theory on which he had been reared. He did challenge the mindless application of those mechanisms to economy-wide markets. Founding what came to be known as macroeconomics, he was modeling a whole economy as a closed system. He knew he could not use the Marshallian assumption that the clearing of one market could be safely described on the assumption that the rest of the economy was unaffected.”

James Tobin (1918–2002) American economist

"Price Flexibility and Output Stability: An Old Keynesian View" (1993)

Olivier Blanchard photo

“Using the popular macroeconomic models of the time, Lucas and Sargent showed how replacing traditional assumptions about expectations formation by the assumption of rational expectations could fundamentally alter the results…. Most macroeconomists today use rational expectations as a working assumption in their models and analyses of policy. This is not because they believe that people always have rational expectations. Surely there are times when people, firms, or financial market participants lose sight of reality and become too optimistic or too pessimistic… But these are more the exception than the rule, and it is not clear that economists can say much about those times anyway. When thinking about the likely effects of a particular economic policy, the best assumption to make seems to be that financial markets, people, and firms will do the best they can to work out the implications of that policy. Designing a policy on the assumption that people will make systematic mistakes in responding to it is unwise.”

Olivier Blanchard (1948) French economist

Source: Macroeconomics (7th Edition, 2017), Ch. 16 : Expectations, Output, and Policy

“At the center of market fundamentalism lies the general acceptance of the Walrasian general equilibrium model, or the neo-classical paradigm. Although many economists came to doubt the universal validity of such models in view of economies of scope, bounded rationality, asymmetric information, and other types of market imperfections and ventured into institutional analysis, the orthodoxy still remains the one which postulate some type of rationality of atomized individuals and the market which mediate among these atomized individuals and firms to reach some stable equilibrium.”

Eisuke Sakakibara (1941) Japanese economist and critic

The End of Market Fundamentalism (1999)

Milton Friedman photo

“I have been impressed time and again by the schizophrenic character of many businessmen. They are capable of being extremely far‐sighted and clear‐headed in matters that are internal to their businesses. They are incredibly short sighted and muddle‐headed in mat ters [sic!] that are outside their businesses but affect the possible survival of business in general. This short sightedness is strikingly exemplified in the calls from many businessmen for wage and price guidelines or controls or incomes policies. There is nothing that could do more in a brief period to destroy a market system and replace it by a centrally controlled system than effective governmental control of prices and wages. The short‐sightedness is also exemplified in speeches by business men on social responsibility. This may gain them kudos in the short run. But it helps to strengthen the already too prevalent view that the ptirsuit [sic!] of profits is wicked and im moral [sic!] and must be curbed and controlled by external forces. Once this view is adopted, the external forces that curb the market will not be the social consciences, however highly developed, of the pontificating executives; it will be the iron fist of Government bureaucrats. Here, as with price and wage controls, business men seem to me to reveal a suicidal impulse.”

Milton Friedman (1912–2006) American economist, statistician, and writer

“A Friedman doctrine‐- The Social Responsibility Of Business Is to Increase Its Profits” (Sept. 1970)

“During the relatively brief period in the late 1960s when economists were pondering the possible obsolescence of business cycles, the scholarly discipline of macroeconomics showed signs of becoming fragmented into speciality areas devoted to components of the then popular large-scale econometric models-for example, consumption, investment, money demand, and the Phillips curve. But more recently the revival of severe real world business cycles, together with the revolutions associated with Milton Friedman's monetarism and Lucas's classical equilibrium models, has brought about a revival of interest in economic analysis that focuses on a few broad aggregates summarizing activity in the economy as a whole-nominal and real income, the inflation rate, and the unemployment rate.”

Robert J. Gordon (1940) American economist

Source: The American Business Cycle, 1986, p. 2

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