The archive.

Haberler builds the theory of comparative cost from a two-country, two-commodity opportunity-cost model, then presses on the imperfections that critics invoke to justify protection. A mere catalogue of deviations from the competitive ideal, he insists, proves only possibility, not necessity: factor immobility alone leaves trade welfare-improving so long as factor prices stay flexible, and it is rigid wages—especially those maintained by unions—that generate the unemployment which can make trade inferior to autarky. Even then protection is a second-best, largely short-run remedy. He extends the same discipline to external economies, showing how unrecognised ones can make a country appear to hold a comparative advantage in the wrong commodity, and to the infant-industry argument, which he accepts in principle while noting it can equally counsel freer trade.

It can be easily shown, however, that what really causes trouble and may make trade detrimental and justify protection is rigidity of factor prices, which may or may not be associated with immobility of factors.

International trade is governed proximately by money prices and money costs, yet exchange-rate complications and pre-trade cost comparisons make the doctrine of comparative advantage easy to misread. Setting the Marshall-Viner real-cost approach against opportunity cost—which he defends as a workable approximation to general-equilibrium theory—Haberler concedes that increasing returns, monopoly, wage rigidity, and external economies all qualify the free-trade case, then argues that liberal policy remains preferable precisely because interventionist systems obscure the comparative costs on which rational choice depends. The paired concluding remarks turn to the postwar dollar shortage, where he sides with the optimists against structural pessimism, credits the 1949 sterling devaluation and disinflation with vindicating the classical adjustment mechanism, and rejects discriminatory restrictions against dollar goods in favour of non-discrimination and the most-favoured-nation principle.

Non-discrimination like honesty still remains the best policy.

At the heart of Schumpeter's theory of capitalist development lies a startling doctrine: a stationary circular-flow economy would have a zero rate of interest, and the positive rate observed under capitalism springs entirely from innovation financed by newly created bank credit. Haberler weighs this extreme version against a milder one and finds the extreme untenable, since it demands both the absence of time preference and zero marginal productivity of capital, assumptions he doubts once routine investment and ordinary impatience are admitted. Yet he defends Schumpeter's larger dynamic account, ranking its disequilibrium approach above the excessively static equilibrium theory of Mises and Hayek, who deny that credit expansion can permanently enrich the capital stock. The comparative question of whether dynamics raises or lowers interest, he concludes, is a comparatively unimportant detail.

The extreme version of his theory is hardly acceptable.

That devaluing a currency must worsen a country's terms of trade was, in 1952, an assumption widely taken for granted, and this compact theoretical note, reprinted here, sets out to dismantle it. Haberler's thesis is deliberately asymmetrical: in the normal case, where depreciation improves the balance of payments, the terms of trade may move either way and cannot be predicted a priori; only in the perverse case, where the balance of payments worsens, must they deteriorate. Working through demand and supply curves priced in dollars, he shows that a depreciation lowers both export and import prices measured in dollars, so one cannot pair dearer imports with cheaper exports and infer a loss. Against Joan Robinson's presumption that supply elasticities generally exceed demand elasticities, he denies that any broad generalization holds.

We have, then, the result that export and import prices move in the same direction.

Critics had turned the Pigou effect into a crude prescription for curing depressions by driving wages and prices down; Haberler writes to rescue it from that caricature. Properly understood, he argues, it is not policy advice at all but a theorem about the internal consistency of the static Keynesian model. In a world of flexible competitive wages, the Keynes effect normally restores full employment through falling interest rates; the Pigou effect closes the extreme remaining cases — a liquidity trap, interest-insensitive investment — by letting rising real balances lift expenditure. This dismantles the one strict basis for a static competitive underemployment equilibrium and undercuts secular stagnation, even as Haberler concedes to Hansen and Metzler that real depressions demand monetary and fiscal action, not patient deflation.

For these two reasons it would be foolish to rely entirely on price and wage deflation to cure a depression through the Pigou effect.

Surveying business-cycle theory at a moment when the field was fragmenting into rival methods, Haberler imposes order with a single 'modest hypothesis': fluctuations in effective demand are the immediate cause of cyclical swings in output and employment. Written in German, the essay insists this is no narrowly monetary claim — Keynesian, Wicksellian, Austrian, and Schumpeterian accounts all fit beneath it — and reformulates the demand-output link through the elasticity of aggregate supply. He treats Hicks's multiplier-accelerator model as the synthesis's high point yet rejects any mechanical accelerator, keeping only the weaker claim that rising income stimulates investment. The essay's sharpest thrust names the Achilles heel of all Keynes-inspired theory: rigid prices and wages, and an aggregation so coarse it hides the structural maladjustments between production and demand.

Es ist den modernen Konstrukteuren mathematischer Modelle vorbehalten geblieben, über alle diese Dinge hinwegzusehen und ein mechanisches Funktionieren des Prinzips anzunehmen.

English translation: “It has been left to the modern constructors of mathematical models to overlook all these matters and to assume a mechanical operation of the principle.”

Was the postwar “dollar shortage” a permanent obstacle to convertible currencies, or a consequence of policies governments could change? In this 1953 article, Gottfried Haberler argues that inflation and unrealistic exchange rates, rather than an incurable scarcity of dollars, repeatedly frustrated multilateral trade. His case is not a costless promise: restoring external balance requires sacrifices in domestic consumption and investment, even when unemployment can be avoided. By separating that unavoidable burden from possible losses through changing terms of trade, he gives readers a precise way to assess the costs of adjustment. His qualified appraisal of regional payments unions sharpens the institutional dilemma: international credit can support countries moving toward convertibility, but it can also sustain the policies that prevent it.

The basic prescription is this: Let exchange rates find their equilibrium level, avoid inflation, and apply disinflationary policies.

The claim organizing this survey is that international trade theory is no autonomous doctrine but general price, production, monetary, and welfare theory applied to a world of nations, currencies, and immobile factors. Tracing the line from Hume's price-specie-flow mechanism and Ricardo's comparative costs through Mill and Marshall's reciprocal demand, Haberler shows how opportunity cost and general equilibrium rescued comparative advantage from the wreck of the labour theory of value. He weighs Heckscher-Ohlin factor-price equalization, the Stolper-Samuelson theorem, and Leontief's paradox, always separating sharp theorems from empirically reliable ones, and carries the same caution into terms-of-trade measurement, the foreign-trade multiplier, and purchasing-power parity. The classical free-trade case survives as a powerful benchmark — never an unconditional theorem.

There exist only rudiments of truly dynamic analysis in the field of non-monetary trade theory.

Whether the non-communist economies would return to multilateral liberal trade or settle into a managed world of controls, quotas, and currency blocs was, in 1954, the question convertibility decided. Haberler first clears the definitional ground, separating full from partial convertibility, resident from nonresident rights, and current from capital transactions, because governments can proclaim liberalization while preserving discrimination through licensing and blocked balances. His normative claim is that convertibility is the monetary form of free trade, letting countries specialize by comparative efficiency instead of matching imports to exports bilaterally. The failed 1947 sterling experiment serves as his warning: it collapsed not because convertibility is unworkable but because inflation and an overvalued pound made it so. Rejecting gold-standard deflation, he favors monetary discipline joined to freely floating rates over the speculation-prone Bretton Woods peg.

It cannot be repeated too often that any form of open or repressed inflation is incompatible with convertibility and stable exchange rates.

Can a theory built around market adjustment still explain trade when governments plan, wages resist falling, and firms exercise monopoly power? In this 1954 paper, Gottfried Haberler answers Jacob Viner’s doubts by separating classical trade theory from the free-trade policies often associated with it. A government may obstruct adjustment without rendering the theory that explains the obstruction irrelevant. Haberler shows why exchange-rate depreciation can fail when compensating policies cancel its effects, and why departures from competition do not automatically justify protection. His qualified defense of free trade rests on comparing workable markets with actual administrative capacities, not ideal planning. Readers can discover how an analytical framework can accommodate exceptions without becoming either an unconditional policy rule or an excuse for intervention.

It is essential, however, that we distinguish between classical trade theory on the one hand and the free trade conclusions derived from the theory on the other hand.

American trade policy of the 1950s contained a puzzle Haberler sets out to resolve: Washington condemned imperial preferences and discriminatory tariffs while applauding customs unions, even though a customs union discriminates against outsiders more sharply than a mere preference does. His resolution turns on economic effect rather than the degree of discrimination. A preferential regime keeps separate national tariffs and invites product-by-product bargaining and capture by protected interests; a complete customs union abolishes internal barriers wholesale, adopts a common external tariff, and is far likelier to create trade than to divert it. He judges genuine unions rare, Benelux being the modern instance, and insists Japan's viability depends on worldwide markets rather than an Asian bloc, holding throughout to multilateralism and the most-favoured-nation clause.

If tariff preferences are bad because they imply discrimination, then a customs union should be worse because it implies a higher degree of discrimination.

Delivered as three lectures in Cairo against the postwar tide of import substitution, the Singer-Prebisch thesis, and Myrdal's backwash pessimism, these essays defend trade as an engine of development while conceding narrowly bounded exceptions. Haberler refuses to equate development with industrialization, Switzerland and Denmark being advanced without it, and reframes comparative advantage as a dynamic channel supplying capital goods, technical knowledge, foreign investment, and competitive discipline. He denies that classical theory ever promised income convergence, and dismantles the claim that primary exporters face a secular deterioration in their terms of trade, faulting its reliance on British price series, freight costs, and quality bias. Disguised unemployment he treats as low productivity, not a free resource; infant-industry protection he allows only as a costly, temporary investment, preferring education, health, and infrastructure to trade restriction.

The underdeveloped countries are not exempt from the general law of scarcity—they least of all, unfortunately.