The General Theory after Ten Years and Sixteen Years Later

Gottfried Haberler’s essay, expanded by a 1962 reconsideration, evaluates Keynes’s General Theory as a theoretical event rather than as an occasion for discipleship. Haberler explicitly narrows the inquiry to analysis, not memorial praise or partisan policy doctrine:

I shall confine myself in this essay to the purely scientific content of The General Theory of Employment, Interest, and Money, the most famous of Keynes’ economic works, whose tenth anniversary unhappily coincided with the death of its author.

His central judgment is balanced: Keynes enormously altered the language, agenda, and prestige of macroeconomic model-building, yet did not overthrow the logical foundations of monetary and cycle theory. Haberler treats the Keynesian system by separating its component functions—consumption, investment, liquidity preference, and money-wage assumptions—from the dramatic conclusions later drawn from them.

The most durable Keynesian contribution, for Haberler, lies in the systematic use of income changes to explain saving, expenditure, and cumulative fluctuations. He is less impressed by the supposed novelty of liquidity preference, arguing that shifts in the desire to hold money matter more than a stable positive relation between interest and cash balances. But he gives Keynes real credit for making the multiplier and income effects central to dynamic analysis:

Keynes’ great contribution was that he strongly emphasized the income factor and used it much more systematically in the analysis of economic change than had ever been done before.

The sharpest criticism concerns underemployment equilibrium. Haberler argues that Keynes’s proof depends on money-wage rigidity. If wages and prices are flexible, the Keynesian system requires special additional assumptions—such as a liquidity trap or interest-insensitive investment—to sustain persistent unemployment as an equilibrium. If wages are rigid, the result is important but not revolutionary, since older theory could already explain unemployment under obstructed adjustment. Hence Haberler’s famous diagnosis:

This is the weak spot of the Keynesian system which is usually slurred over by the Keynesians.

This point also governs his treatment of the Keynes effect, the Pigou effect, and real-balance reasoning. Haberler does not claim that deflation is an easy or humane cure for depression; expectations, insolvencies, and credit breakdowns may make falling wages and prices destabilizing. His claim is narrower: Keynes’s closed model omits channels through which price and wage flexibility may restore demand. The question is therefore not whether depressions occur—they plainly do—but whether Keynes has established a general theoretical impossibility of full-employment adjustment.

Haberler’s discussion of Say’s Law follows the same method. A crude doctrine that all income is automatically spent is false, but he insists that serious pre-Keynesian monetary and business-cycle theory had already abandoned it. Keynes’s achievement was to clarify and dramatize neglected relations among money, income, expectations, and employment, not to discover aggregate demand from nothing. The later 1962 essay reaffirms this view while criticizing both anti-Keynesian caricature and Keynesian orthodoxy.

On policy, Haberler separates Keynes’s own aggregate-demand argument from broader programs of planning, socialism, or comprehensive investment control. The General Theory, as he reads it, supports monetary expansion and perhaps modest fiscal policy against mass unemployment; it does not by itself solve structural unemployment, wage-push inflation, restrictive labor practices, or misallocation. In growth theory too, he distrusts attempts to build rigid long-run laws from short-run Keynesian constants.

The final verdict is methodological. Keynes compelled economists to refine their analysis of employment and money, but Haberler resists treating the General Theory as scripture or its author as an oracle. The essay’s lasting force lies in this disciplined refusal of both dismissal and veneration:

Hero worship is nowhere less appropriate than in science.