The archive.

Keynes defines the multiplier as the reciprocal of one minus the marginal propensity to consume — and in that definition, this methodological critique argues, the celebrated result is already smuggled in. To infer a large multiplier from a high propensity to consume explains nothing, Haberler contends, unless that propensity has been established independently; otherwise the argument merely renames the unknown magnitude it claims to illuminate. He separates the formal aggregate propensity, which is just the algebra of the multiplier, from the psychological propensity describing how people actually spend, and shows that leakages, time lags, monetary velocity and displaced investment stand between them. The same defect, he adds, runs through Keynes's Treatise, where saving and investment are defined into equality and then made to explain one another. Identities can clarify accounts while misleading theory when mistaken for mechanisms.

By assuming something about the marginal propensity to consume he assumes something about the multiplier, but this is no more an explanation of the multiplier that pauvreté is an explanation of poverty.

A common mechanism of contraction need not imply a common cause—or a uniform remedy. That distinction anchors Gottfried Haberler’s 1937 review of R. F. Harrod’s The Trade Cycle. Haberler admires Harrod’s account of investment and consumption reinforcing one another, yet questions whether it explains why expansion must end. His criticism becomes especially concrete when he examines workers temporarily holding their wages: does calling these balances “saving” clarify how investment is financed, or merely rename the receipt of income? Readers encounter a critic willing to accept a particular explanation of the downturn while resisting its elevation into a universal diagnosis. The resulting disagreement over public works turns on what caused the crisis, not simply how contraction spreads.

The process of contraction may be in the main features always the same, but the cause by which it is initiated need not be and probably is not always the same.

Does the equality of saving and investment express an economic fact, or follow from how the terms are defined? In this brief 1938 reply, Gottfried Haberler challenges Copeland’s claim that consistent definitions necessarily produce equality, while defending Robertson’s terminology against an alleged contradiction. His approach is neither to reject accounting identities nor to impose one vocabulary, but to distinguish what definitions establish from what requires economic explanation. The concrete test is timing: today’s earned income is not the same as today’s disposable income when the latter means yesterday’s earnings. Following this distinction, readers can see how spending from hoards or newly created money enters the account—and how shifting the meaning of “income” can manufacture a contradiction.

If saving and investment are equal by definition, what can their equality explain? In this 1938 essay, Gottfried Haberler separates an accounting identity from the monetary processes and changing plans that business-cycle theory must explain. His engagement with Keynes is discriminating: he accepts the saving–investment identity while challenging its use as an explanation of adjustment. The same concern for conceptual precision shapes his treatment of national income as a welfare measure. More medical spending need not mean better health, and government services cannot all be counted alike without risking duplication or misleading valuation. Readers can discover why welfare appraisal, causal explanation, and statistical estimation require different definitions—and why a discrepancy between measured saving and investment need not establish economic disequilibrium.

Can an economy hoard money even when its total cash holdings remain unchanged? In this reply to R. F. Kahn’s review of Prosperity and Depression, Gottfried Haberler argues that it can: expenditure and income may fall without any reduction in the money stock. This distinction anchors his defence of a monetary account of economic fluctuations against Kahn’s criticisms. Haberler’s distinctive concern is to separate differences of vocabulary from differences of explanation—especially where saving–investment identities threaten to substitute for accounts of how adjustment occurs. His qualified acceptance of public works sharpens the stakes: additional government spending must increase total demand, not merely displace expenditure elsewhere. The reply offers a focused encounter with the contested boundary between monetary circulation, effective demand, and the financing of recovery.

Germany’s falling unemployment and rapid rearmament posed an uncomfortable question: did military mobilization demonstrate economic efficiency, or merely efficiency at serving a narrowly coercive purpose? In this brief symposium contribution, Gottfried Haberler separates employment, consumption and stability as measures of economic performance. He challenges easy comparisons between dictatorships and democracies by contrasting Germany’s employment record with Italy’s, while qualifying the statistical evidence. He also distinguishes a conceivable economic policy—replacing armaments expenditure with civilian investment—from its doubtful political feasibility. Rather than resolving whether democracies could match Germany’s apparent productive effectiveness, Haberler sharpens the question: what would comparable efficiency mean if consumer choice and political freedom were preserved? The contribution offers a compact exercise in judging economic results without confusing productive capacity with the desirability of its ends.

Can democratic governments secure recovery without sacrificing the freedoms that make it worthwhile? In this condensed round-table statement, Gottfried Haberler distinguishes falling unemployment from rising production, consumption, and economic welfare: Germany’s apparent advantage changes when armaments, leisure, and consumer choice enter the comparison. His distinctive—and contentious—proposal is to separate authoritarian techniques of cost control from authoritarian political aims. He attributes stalled recovery in France and the United States partly to premature wage and price increases, and suggests that democracies could restrain these pressures and remove productive bottlenecks without adopting comprehensive regimentation. The statement makes visible a difficult tension between employment and freedom while leaving open how democratic institutions might implement the controls he recommends.

A comprehensive account of trade controls is not necessarily an account of trade planning. This distinction anchors Gottfried Haberler’s brief 1940 review of Heinrich Heuser’s Control of International Trade. Haberler values the book’s otherwise hard-to-find material on import quotas, exchange controls, and bilateral clearing and payment agreements, while noting its omission of the broader planning questions raised by the Russian and German systems. His judgement gives teachers of international trade a concrete assessment of the book’s usefulness, tempered by criticism of its editing and organization. The review offers a compact example of how Haberler separates descriptive coverage, theoretical analysis, and practical usability in assessing economic scholarship.

When a household buys a car on monthly instalments, does that credit drive the business cycle or merely ride it? This National Bureau study, completed as Regulation W brought consumer credit under wartime control, argues firmly for the second view. Haberler defines instalment credit narrowly — scheduled repayment, finance charge, short maturity, a negotiable instrument — and shifts attention from the stock of debt outstanding to the flow of net credit change, the excess of new lending over repayments, which he takes as its direct contribution to effective demand. Durable-goods purchases, especially automobiles, make that flow cyclically volatile and, through the acceleration principle formalized in Samuelson's appendix, magnify swings in output. Yet credit follows income rather than leading it; between the oversaving arguments of Keynes and Hansen and the Austrian warnings of Hayek and Mises, Haberler places credit as amplifier, not motor.

The dog wags the tail and not the tail the dog.

A quota is not a tariff by another name, even when both cut imports to the same level: where a duty preserves market allocation, price contact between countries, and revenue for the treasury, a quantitative control rigidly fixes quantities, breeds monopoly and quota rents, and shifts power from legislatures to administrators. Written in 1943 with an eye to the postwar settlement, this study traces how licensing born of wartime scarcity hardened, through the sterling crisis and the gold bloc's defensive measures, into a standing tool of protection, retaliation, and bilateral bargaining that fragmented 1930s trade. Haberler roots the persistence of controls in monetary instability and political insecurity, and sets the Atlantic Charter's promise of equal access against the drift toward autarky, warning that a tightly controlled trade system cannot long coexist with a free domestic economy.

From being isolated measures to limit the importation of a few specific commodities, they came to be consciously used in many countries as a general instrument of protection.

Written in 1943 with postwar reconstruction already in view, this chapter poses a constitutional rather than merely tariff question: whether international cooperation should be built through universal institutions or through larger regional and continental federations. Haberler answers cautiously. Larger markets do permit mass production and a wider division of labour, but that gain belongs to nondiscriminatory liberalization, not to protected spheres, so he separates the complete customs union, which genuinely enlarges a market, from the incomplete preference, which merely diverts imports from cheaper outsiders to favoured insiders and hands them a windfall. Dismantling Pan-Europe, Pan-America, and Danubian schemes as geographically incoherent or coercive, he anticipates the later vocabulary of trade creation and diversion, and warns that partial blocs turn cooperation into exclusion.

To put the question the other way around: suppose that some machinery for international co-operation on a worldwide scale, like the League of Nations, is set up; should it be based on regional blocs or on independent states?

Policies suited to a general depression may fail when unemployment is concentrated in particular places. This distinction anchors Gottfried Haberler’s 1944 review of Robert R. Nathan’s Mobilizing for Abundance, a popular exposition of the Keynes–Hansen theory of oversaving. Haberler accepts that preventing a deflationary spiral helps governments address local economic troubles; he objects to treating aggregate demand as a sufficient diagnosis of postwar difficulties. His criticism turns on what Nathan leaves out: resource maldistribution, wage and price rigidity, labor mobility, and inflation. The review offers a pointed account of the difference between making economic policy accessible and making it deceptively simple—and of how prescribing demand stimulus under unsuitable conditions could discredit that policy when it is genuinely needed.