The archive.

In interwar debates over lending to booming securities markets in Germany and the United States, popular hostility held that stock-exchange credit drains resources from industry and manufactures crises. First published in 1931 in the Beitraege zur Konjunkturforschung series of the Austrian Institute for Business Cycle Research, then directed by Hayek, this study recasts that accusation as a precise question: what is actually taken up when securities are bought on credit? Machlup's answer turns on the distinction between Realkapital, produced means of production, and Kapitaldisposition, command over investible purchasing power. Speculation shifts claims and prices without immobilizing plant; only bank credit created beyond genuine saving binds capital, as a localized inflation that later distorts the production structure. The securities market, he concludes, is the principal channel of industrial credit, not its enemy.

Realkapital — produzierte Produktionsmittel — also Ziegelsteine, Eisenträger, Maschinen, Drahtstifte, Hebekrane usw. werden von der Effektenspekulation weder absorbiert noch aufgesaugt, noch gebunden.

English translation: “Real capital—produced means of production—that is, bricks, iron girders, machines, wire nails, cranes, and so on, is neither absorbed nor soaked up nor tied up by securities speculation.”

A currency can remain a gold currency without ever putting gold into everyday hands—this is the paradox Machlup sets out to define rather than to sell. Separating the monetary standard from the physical medium of payment, he argues that gold need not circulate as coin if it is concentrated as a reserve behind a system held at parity through the Umtauschprinzip, the rule of convertibility between domestic and foreign money at a fixed rate. Tracing the idea to Ricardo's neglected 1816 ingot plan, appended here, and testing it against India, the South American conversion offices, and Austria-Hungary's own krone, he shows the arrangement economizes scarce gold while preserving discipline. The system is not self-enforcing: its sole danger, he insists, lies in inflationary measures.

Goldkernwährung bedeutet Goldkonzentration.

English translation: “The gold-core standard means the concentration of gold.”

Frank Knight's assault on the Austrian period of production provokes this sharp rejoinder, in which Machlup concedes the term's clumsiness while rescuing the concept it names. Capital, he insists against Knight, is not perpetual: maintenance may be assumed in a stationary model but cannot be smuggled in when the very question is whether capital is preserved, enlarged, or consumed. Renaming it the period of investment, he locates it on the input side—productive services carrying consumption distances—and shows that neither construction time nor average durability exhausts its meaning. The payoff is business-cycle theory: credit expansion stretches the investment period beyond what voluntary saving would support, so the crisis springs from a divergence between individual time preferences and the time structure of production, not from monetary mishap alone.

To explain unemployment (through wage stickiness) is one thing; to explain the business cycle is another.

Where formal precision should have brought clarity, the debate over the elasticity of substitution had instead grown unintelligible, its related but distinct ideas forced under one name. Machlup's clarification separates Robinson's and Hicks's appendix concept—a partial-equilibrium measure of technical substitution—from Hicks's main-text concern with factor shares in the National Dividend. His commonsense rests on substitution within increase: when a factor grows more abundant the economy does not discard the other, but industries rearrange combinations as the community absorbs the larger supply. Distribution theory, he argues, needs an elasticity of total substitution fusing producers' technical substitution with consumers' choice among commodities—and every such elasticity rises with the time allowed for adjustment, since fixed capital yields only slowly.

THE discussion of the “elasticity of substitution” is conspicuous for its unintelligibility.

An abundant wheat crop lowers prices; dearer labour and cheaper capital spur labour-saving inventions; endangered banks receive central-bank credit — three statements that look logically alike yet do not, Machlup insists, carry equal economic validity. Writing in 1936 amid the quarrels over Lionel Robbins's definition of economics and Ralph Souter's revolt against disciplinary 'regimentation,' he ranks propositions by the anonymity and generality of the conduct they presuppose, a vocabulary he borrows from Alfred Schütz. The payoff is practical. In international transfer theory, a low-generality institutional assumption about central-bank credit gets smuggled into a causal chain as though it were a market law, and the argument collapses. Methodology earns its keep, he concludes, precisely because failing to mark the order of one's statements has serious practical consequences.

The type of the competitive seller is not so likely to disappear from the economic stage as the type of the benevolent central bank manager.

A productive service is never simply a thing but a quantity applied over an interval, and from that observation Machlup builds a patient dismantling of loose talk about the marginal product. Labour-hours, acre-seasons, machine-days: each unit depends on divisibility, and highly qualified labour may be hired by the minute at one extreme or by five-year contract at the other. 'Efficiency units' tempt the theorist into circularity, since a theory meant to explain factor prices cannot first define factor quantities by those prices. What matters for a firm's hiring, he argues, is neither extra bushels nor their value at an unchanged price, but an expected, dated, discounted money net product framed by a definite competitive situation — marginal productivity rendered conditional rather than emptied of meaning.

This third dimension is, then, the time interval between the application of any productive service, say a labor-hour, and the enjoyment of its product.

The multiplier, in Keynes and Kahn, arrives as a timeless ratio linking investment to income; Machlup's 1939 intervention insists it can only be understood as a dated process. Public wages become shop receipts, which become factory receipts, which only later become incomes to be spent again — and between the rounds lie inventories, pay dates, and spending habits. He builds an 'income propagation period,' tentatively about three months, to measure how long expenditure takes to become income anew, and shows that a higher propensity to consume yields a larger eventual multiple but a longer road to it, so a government minding the coming fiscal year may collect only a fraction. Leakages, he adds, need not mean hoarding; saved funds may repay debt or buy securities, deferring rather than destroying the next round of spending.

For a discussion of time lags, transition phases, and other intertemporal relationships, Keynesian terminology is not well suited.

'Forced saving' had wandered through monetary theory, cycle theory, war finance, socialism, rationing, and corporate boardrooms, collecting incompatible meanings along the way — and this 1943 survey sets out to disentangle them. At its core lies a monetary idea: when bank credit or newly active money finances investment, capital formation can exceed what people meant to save, forced on the community, in Machlup's phrase, through monetary witchcraft. But the real consequences vary wildly, from no added investment under immobility to genuine consumption sacrifice at full employment. Drawing on Robertson's careful separation of money 'lacking' from real deprivation, and on Mises, Schumpeter, and Keynes, he ends with a thirty-four-item taxonomy of synonyms and homonyms, deliberately retiring the ambiguous phrase itself. A term that connotes so many meanings, he concludes, has lost its usefulness.

Saving refers merely to money amounts; lacking, on the other hand, refers to “real” quantities.

Empirical critics of the 1940s claimed that interviews and questionnaires had caught firms behaving in ways marginal analysis could not explain; the reply here is that they had misunderstood the theory they meant to refute. Economic theory, Machlup argues, is essentially a theory of adjustment to change, and its variables are the entrepreneur's own expected costs and revenues, not the observer's accounting magnitudes — a driver overtaking a truck responds to speed and distance without computing them. Reports of 'full-cost' pricing dissolve on inspection: average cost may smooth fluctuations over time, discipline a cartel, or hint at rivals' demand elasticity without contradicting marginalism. He is hardest on Richard Lester's wage-employment surveys, whose 'importance' ratings confuse frequency with marginal effect. The theory has not been disproved, he insists, though better empirical work, grounded in theory, is badly needed.

The business man does what he does on the basis of what he thinks, regardless of whether you agree with him or not.

Sealed bids for cement and steel that match to the penny are no accident but the signature of a pricing formula — and this 1949 study, rushed out after the Supreme Court's Cement Institute decision, anatomizes how that formula works and why it should go. Under basing-point pricing a delivered price is reckoned from a designated base point whether or not the goods ship from there, so 'phantom freight' and 'freight absorption' erase local cost advantages and make rival quotations converge. Machlup treats this as geographic price discrimination and, tracing case histories in steel, cement, and corn products, as a cartel embedded in freight books and classifications rather than open conspiracy. Against warnings of chaos he sets uniform f.o.b. mill pricing, under which distance again becomes visible and buyers can hunt for genuinely cheaper sources.

Almost all economic change leaves some people worse off.

In 1906 Schumpeter defended mathematical economics; in 1949 he pleaded for historical analysis — a reversal only in appearance, Machlup argues, for the man never lost the one nor lacked the other. What held across four decades was a disciplined pluralism: theory, statistics, and history each earn their keep on the problems they suit, and the sectarian spirit of the Methodenstreit, which made each camp treat its method as the only scientific one, was the real enemy. Machlup follows Schumpeter from bare functional relations toward an eventual acceptance of causal language, and shows how the split between statics and dynamics turns methodological choice into substantive economics: equilibrium explains the circular flow, while the entrepreneur's discontinuous innovation drives development. Methodological individualism, he stresses, is a rule for building explanations, not a creed of laissez-faire.

It follows that the claim usually made for statistical induction and verification must be qualified. Material exposed to so many disturbances as ours is, does not fulfill the logical requirements of the process of induction.

Can devaluation cure a trade deficit? The mid-century answer split into two camps, and this 1955 article refuses to let either win outright. Against Sidney Alexander's claim that his 'income-absorption' approach supersedes the older elasticities method, Machlup grants the weaknesses of relative-price reasoning — supply and demand curves for foreign exchange shift once devaluation changes costs and incomes — but shows that the accounting identity Y ≡ A + B, however clarifying, is no causal theory. Alexander's gravest omission is resource reallocation: devaluation can raise real income by moving resources into more valuable uses, an effect no marginal propensity to absorb can capture. Reasoning from identities, Machlup warns, tempts the analyst into implicit theorizing. Neither set of tools can be spared; both relative prices and aggregate spending are needed.

The trade balance is negative when the nation absorbs more than its income.