The archive.

Comparative advantage, not absolute superiority, is what makes trade pay — a country gains by exporting where its disadvantage is least and importing where it is greatest, even against a rival more efficient at everything. This essay rebuilds that classical theorem on firmer ground, replacing Ricardo's labour theory of value with opportunity cost: the real cost of more of one good is the quantity of another forgone along a substitution curve. Haberler then extends the argument from two goods to many, ranking commodities along a shifting export-import margin set by wages, exchange rates and the balance of payments. He turns the framework against the case for retaliatory tariffs and against protectionist appeals to immobile capital, arguing that idle plant and written-down assets are private losses, not proof of national waste.

Unilateral free trade is thus—tactical considerations aside—thoroughly desirable and preferable to a generalized tariff regimen.

How does a country saddled with reparations actually hand real resources across its borders, and must its export prices fall to do so? That question, sharpened by Germany's post-Versailles burden, sets Haberler against Bertil Ohlin in these two essays, translated from the 1930 article and its 1931 rejoinder. Endorsing the Thornton-Mill view that price movements are almost always needed to force the required export surplus, he nonetheless refuses the standard conclusion that the terms of trade must turn against the payer, showing that they can conceivably improve. Against Keynes's transfer pessimism he judges a demand elasticity of one or less for German exports highly improbable, given Germany's competitive industries and small share of world markets, while carefully separating the international transfer problem from the domestic fiscal task of raising the sums.

One could say, therefore, that Keynes was right in theory but his opponents in practice.

Can a comprehensive account of international trade explain much if its basic concepts are unstable? In this 1931 review of Franz Eulenburg’s Aussenhandel und Aussenhandelspolitik, Gottfried Haberler tests a broad historical and policy survey against exacting theoretical standards. His distinction between selling cheaply abroad and charging different prices at home and abroad makes the stakes concrete: an account of dumping can fail at the level of definition. He likewise objects to tariff analysis that precedes an adequate explanation of comparative costs. While acknowledging useful historical material, Haberler argues that facts require a coherent explanatory framework. This brief, sharply critical review shows what he demands of trade scholarship—and why, for him, theoretical order is more than a matter of presentation.

Stable prices need not mean a stable economy: this is the challenge Gottfried Haberler foregrounds in his 1931 review of Hayek’s Geldtheorie und Konjunkturtheorie. He explains how bank credit can permit investment to outrun real saving without producing a visible rise in the general price level. Yet his sympathetic assessment also finds room for non-monetary explanations: invention or optimism may initiate an expansion that credit makes possible. Haberler’s distinctive contribution lies in separating the initiating event from its monetary enabling condition, rather than insisting on rival theoretical labels. He also marks what Hayek’s book leaves unresolved—how distorted investment culminates in crisis—making this short review an appraisal of both the reach and the limits of the explanation.

Haberler delivered this lecture with the Depression as backdrop, but treats panics, bank failures and crashes as secondary drama; the real object of explanation is the recurrent rhythm of expansion and contraction in business activity. Money is a necessary condition of the cycle, though not in the crude quantity-theory sense: stable prices in the 1920s, he argues, concealed a "relative inflation" in which credit expansion masked the fall that rising productivity should have produced. The decisive shift is from the level of prices to the vertical structure of production. When bank credit pushes the market rate of interest below the rate warranted by voluntary saving, entrepreneurs lengthen production into more roundabout, capital-intensive projects that consumers have not chosen to fund — a maladjustment that the depression, painfully, corrects. Reflation aimed merely at purchasing power risks reviving the very disproportions that need liquidating.

The fundamental appearance of the business cycle is a wavelike movement of business activity

Must workers displaced by machinery accept lower money wages before they can find employment again? In this short 1932 intervention, Gottfried Haberler challenges Alvin Hansen’s claim that unemployed workers’ lost purchasing power cancels consumers’ gains from cheaper goods. His distinctive move is to follow money through successive payments: eliminating one stage of expenditure can bring demand to other producers sooner. Haberler argues that, with money quantity and circulation velocity unchanged, reemployment need not require lower equilibrium money wages. The value of this tightly focused dispute lies in the distinctions it forces: technological displacement is not monetary contraction, and an equilibrium result is not a promise of painless adjustment. Haberler explicitly leaves room for losses and frictions as workers move between industries.

Defending free trade, Haberler argues, requires admitting that tariffs can sometimes confer benefits—even on a country as a whole. In this 1932 review of the committee report chaired by Sir William Beveridge, he praises a method that concedes theoretical possibilities while testing how plausible their conditions are in practice. His concern is both analytical and persuasive: absolute claims leave free traders vulnerable to objections they have failed to answer. Britain’s departure from gold gives that distinction a concrete setting, removing, in his assessment, the basis for Keynes’s proposal to use tariffs instead of devaluation or wage reductions. This short review shows why Haberler regarded qualification not as a retreat from free trade but as a condition of its credible defense.

Here in the English translation of Haberler's 1933 Der internationale Handel, the whole of foreign trade is folded into general price theory: exchange rates are prices formed by supply and demand, balances of payments are not autonomous magnitudes, and comparative advantage is rebuilt on opportunity cost rather than the labour theory of value. The treatise runs from the foreign-exchange market and the gold standard through the transfer problem — with extended treatment of German reparations and the Keynes-Ohlin controversy — to a systematic anatomy of commercial policy: tariffs, dumping, cartels, infant-industry claims and quotas. Throughout, protection is judged by its hidden diversion of resources and its costs to consumers and exporters, not by the visible survival of sheltered industries. Haberler reserves his sharpest hostility for quantitative restrictions, which suppress the price mechanism more arbitrarily than any duty.

It is the increase and not the reduction of duties which is the real economic burden!

How much qualification can popular economics afford—and how much can it afford to omit? In this short review of Barrett Whale’s International Trade, Gottfried Haberler makes precision, rather than simplicity alone, the test of successful exposition. He singles out Whale’s treatment of purchasing power parity for preserving a useful insight without disguising its limits, contrasting it with Cassel’s popular writings. The same standard informs his approval of Whale’s qualified free-trade position: protection may sometimes confer economic benefits, yet identifying and administering those exceptions presents formidable difficulties. The review offers a compact view of Haberler’s judgement about the relationship between theoretical exceptions, practical policy, and writing for the general reader.

How do comparative advantages become the money-price differences that actually direct exports? This is a central test Gottfried Haberler applies to R. F. Harrod’s International Economics in his 1934 review. Admiring the book’s originality, Haberler nevertheless finds its trade theory insufficiently connected to its account of monetary adjustment. His criticism turns on concrete mechanisms: changing factor valuations, the timing of receipts and expenditures, and increased demand in countries receiving international transfers. He also tests managed-currency proposals against the conflicting demands of domestic price stability, fixed exchanges, and protectionist politics. The review offers a compact encounter with Haberler’s insistence that analytical ingenuity must explain how adjustment occurs—and why monetary management cannot simply remove rigidities in wages and other costs.

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.