The archive.

Peace among formerly sovereign states, this 1939 essay argues, cannot rest on political or military union alone; it requires a genuine common market, and that market quietly disarms the interventionist state. Once goods, people, and capital move freely across internal borders, no member government can prop up local prices, shelter a monopoly, or sustain a restriction scheme dependent on territorial control—and, Hayek adds, the federation itself cannot easily replace those powers, because a large heterogeneous people will not agree on whose industries deserve protection. Economic planning presupposes a shared scale of values that diversity denies. Socialism becomes the limiting case: incompatible with free movement within, and lacking the common purpose a socialist union would require. Federation thus emerges as both a peace project and a liberal constraint, with Robbins and Streit in view.

The whole armory of marketing boards and other forms of monopolistic organizations of individual industries will cease to be at the disposal of state governments.

Cheap borrowing does not make steel, machinery or time more abundant. In this 1939 article, republished in 1997, Hayek asks whether wartime authorities should hold interest rates down when urgent production needs make capital scarcer. His distinctive emphasis is on investment’s timing: a machine that saves more labour overall may still be a poorer choice if its benefits arrive too late. He treats interest chiefly as a means of allocating capital, rather than rewarding saving, and follows that distinction into practical decisions about replacing worn equipment or diverting maintenance resources to armaments. The article offers a compact way to distinguish financial ease from real productive capacity—and explains why, in Hayek’s view, a misleading interest rate can distort the choices of government planners and private entrepreneurs alike.

Protecting a producer’s price can unsettle everything around it. In this 1939 address, Oskar Morgenstern examines European public monopolies through the incentives their guarantees create, rather than their formal administrative structure. Austria’s milk regulation and Czechoslovakia’s grain monopoly supply concrete cases: protected prices encourage output while consumption falls, leaving authorities to finance surpluses, restrict production, and police unofficial trade. His central contention is that each attempt to preserve the original price commitment demands further controls. Political interests in distribution help explain why retreat proves difficult. The address offers a sharply critical account of the difference between stabilizing prices and stabilizing economic life, tracing how measures intended to protect producers can shift costs onto consumers, employment, and unprotected sectors.

Split cleanly in two, the Keynesian multiplier here becomes an instantaneous logical ratio implied by the marginal propensity to consume and a dynamic process by which output actually adjusts over time. The first follows at once from how income-receivers divide any increment between spending and accumulation; but that behaviour alone, Shackle stresses, cannot explain why firms would expand the output of consumption goods. Only assumptions about entrepreneurs' reactions to sales, inventories, and expected income turn the ratio into a theory of production. Where earlier writers assumed intended accumulation and realized saving simply coincide, he foregrounds their possible divergence: an attempt to raise the pace of accumulation runs down consumer-goods stocks unless output follows. The open-economy extension folds an export surplus into the same field as domestic investment, so a rising surplus can set expansion going exactly as investment does.

Hitherto in expressing the multiplier principle authors have assumed *equality*.

Can an account of conflicting worldviews also explain why political restraint fails? In this brief 1939 review of Harley Farnsworth MacNair’s The Real Conflict between China and Japan, Emil Lederer welcomes an explanation that reaches beyond territory, wealth and power to the historical beliefs shaping state ambitions. His sharper intervention concerns the consequences of that explanation: he argues that a Japanese political system driven by prestige and unlimited ambition leaves advocates of a “sensible” policy powerless and makes appeasement futile. The review offers a compact encounter between appreciation and criticism, showing how Lederer turns MacNair’s account of ideological conflict into a question about whether a political system can accommodate moderation.

Can a demand curve measured across decades remain meaningful if the relationship it describes is itself changing? In this review essay on Henry Schultz’s 1938 treatise, Gerhard Tintner combines admiration for empirical demand research with a pointed challenge to its static assumptions. Dividing historical data into separate periods, he argues, yields successive snapshots without explaining how demand changes. His alternative allows both the position and slope of a demand curve to vary, ideally in response to economically meaningful factors such as population, expectations, and tastes. Equally crucial is testing whether the unexplained residuals are random before trusting statistical significance. The essay offers a concrete encounter with the tension between elegant estimation and economic change—and with Tintner’s insistence that economic theory and statistical diagnosis must develop together.

An exchange-rate change can increase export volumes while reducing receipts in foreign currency—and import expenditure can rise in one currency while falling in another. In this first installment of The Theory of Foreign Exchanges, Fritz Machlup uses such distinctions to connect currency markets with production, consumption, and competition. His central challenge is to explanations that treat national price levels as independently given determinants of exchange rates. By tracing how exporters win customers from competitors, how new goods become tradable, and how overseas payments redirect domestic spending, he shows why exchange rates can move without prior inflation or deflation. Readers gain a concrete way to distinguish accounting identities from behavioural responses, and genuine changes in trade from the effects of the currency used to measure them.

A programme for full employment can be sound in principle yet act too late. In this 1939 review of H. S. Dennison and collaborators’ Toward Full Employment, G. L. S. Shackle welcomes their proposals while testing the assumptions that would make them effective. Why wait for unemployment to rise visibly before launching public works? What if prosperity fails to repay the debt incurred during a slump? His sharpest monetary objection follows borrowed money beyond its first use: the economic consequences depend on successive recipients, not simply on the original loan’s purpose. This short review offers a concrete encounter with Shackle’s policy judgement—sympathetic to measures supporting effective demand, but alert to timing, uncertain fiscal outcomes, and the limits of credit classifications.

Why should wartime allies trade as though they were strangers? In this 1939 letter to The Spectator, reprinted in 1997, Friedrich August von Hayek turns Norman Angell’s proposal for Anglo-French federal unity into an immediate economic challenge. Expensive domestic purchases, inferior substitutes and currency restrictions, he argues, weaken the partners’ combined productive capacity. His example of reciprocal luxury trade sharpens the point: suppressing industries poorly suited to military production need not free useful resources for war. This brief intervention shows Hayek testing a political aspiration against practical arrangements, distinguishing unavoidable cross-channel transport difficulties from policy barriers that allies could remove.

Full employment is both an economic objective and a condition of political survival in John Strachey’s programme for a transition towards socialism. In this short review, G. L. S. Shackle credits Strachey with understanding Keynes while questioning his circuitous route from orthodox socialist principles to Keynesian policy. His most pointed reservation concerns institutions: how can consumers remain free to choose if industries’ relative outputs are settled in advance? Shackle’s response lets readers see a sympathetic economist distinguish persuasive proposals for investment and consumption from an unresolved problem of planning. His closing admission that the book has changed his own thinking gives this appraisal a personal stake without dissolving its critical judgement.

Agreement is not enough to make an argument persuasive. In this 1940 review of Carl Snyder’s Capitalism the Creator, Hayek praises the statistical evidence for industrial progress while questioning its power to defeat rival economic explanations. His sharpest objection concerns the word “capitalism”: does it mean production using large quantities of capital, or free enterprise and private ownership? Evidence for the first does not necessarily establish the case for the second. The review offers a compact encounter with Hayek as a sympathetic but exacting critic, showing why he regards explicit theory and precise definitions as indispensable even to conclusions he largely shares.

Yet, although I happen entirely to agree with him on almost all these points, I fear that his facts will convince few who hold contrary opinions.

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.