The archive.

Capital has no measurable counterpart among material objects; it exists only in the entrepreneur's appraisal of heterogeneous goods—and from that premise Lachmann builds an entire theory. Against the aggregate 'quantity of capital,' he substitutes an ordered pattern of capital combinations, deriving multiple specificity, complementarity, and finally capital structure from the plain fact that capital resources are heterogeneous. Expectations are interpretive acts, not mechanical data; prices communicate knowledge but must be decoded, some movements meaningful and others functionless. Process analysis follows plans through disappointment, regrouping, and fresh disequilibrium, while forward markets and the Stock Exchange help coordinate divergent expectations that price rigidity would betray. Reinterpreting Böhm-Bawerk's roundaboutness as changing composition rather than more time, and applying the framework to the strong boom, this 1956 work makes capital theory a study of order, failure, and regrouping.

The Theory of Capital is, in the last resort, the morphology of the forms which this pattern assumes in a changing world.

Uncertainty can drive people to hoard cash—or to flee a currency altogether. What, then, makes it an explanation of liquidity-preference? In this 1937 article, Ludwig Lachmann locates the decisive uncertainty in the relationship between debtor and creditor: obligations must be discharged in money, while repayment demands and renewed credit cannot be taken for granted. His challenge to Keynes turns on market organisation rather than psychology: investors able to hedge through forward markets need not express bearish expectations by holding cash. The reader can discover why Lachmann separates expectations about asset prices from the institutional reasons for seeking liquidity, and how that distinction changes his diagnosis of banks whose pursuit of cash after a crisis may deepen the contraction.

Inventories that look excessive in a depression may be precisely the reserves a recovery needs. In this 1938 journal article, Ludwig M. Lachmann and F. Snapper challenge the assumption that surplus stocks must disappear before expansion can resume. Drawing on commodity statistics and contrasting cases such as rubber and copper, they argue that industrial raw-material stocks generally accumulate during contraction and shrink during prosperity, buffering rather than simply amplifying fluctuations. Their distinctive emphasis is on who holds the goods, who can finance storage, and how production lags and market expectations affect inventory movements. The article shows why fixed equipment and raw-material reserves cannot be treated as interchangeable forms of investment—and why aggregate stock figures alone cannot explain a crisis.

Prosperity can undermine the investment that set it in motion. In “Investment and Costs of Production,” Ludwig Lachmann explains how rising consumption can increase construction costs without improving the expected long-term returns on durable assets. His distinctive move is to examine relative profitability rather than aggregate income: unemployed workers and idle machinery do not eliminate shortages of the particular skills and equipment a project requires. Readers can discover why cheap credit may fail to overcome these bottlenecks—and why commodity speculation may accelerate the cost increases that discourage investment. The article develops a qualified defence of Austrian cycle theory, while refusing to infer that falling costs will necessarily restart interrupted production. Its central tension is between an expansion’s apparent resources and the specific combinations needed to sustain it.

Rejecting a stationary economy need not mean rejecting equilibrium analysis. In this 1939 review of Moses Abramovitz’s An Approach to a Price Theory for a Changing Economy, Ludwig M. Lachmann draws a sharp distinction between claiming that markets tend towards equilibrium and using equilibrium to test whether entrepreneurs’ plans can fit together. He welcomes Abramovitz’s attention to investment, time and expectations, but argues that abandoning market analysis leaves those plans disconnected. Forward markets supply Lachmann’s alternative: a framework for relating expected prices across dates. This brief, pointed review offers a concrete way to reconsider the supposed opposition between equilibrium and change—and shows why Lachmann finds an implicit equilibrium concept in the very approach that rejects it.

Profits need not fall for a boom to end: they may simply cease to exceed entrepreneurs’ rising expectations. In this review of G. L. S. Shackle’s Expectations, Investment and Income, Ludwig M. Lachmann welcomes that possibility but presses a harder question: why do expectations change, and why should producers respond alike? His criticism distinguishes an explanation of individual investment decisions from an explanation of economy-wide turning points. Pauses to consolidate existing businesses, he argues, cannot account for the sudden growth of new industries; invoking disappointed expectations leaves entrepreneurial exuberance unexplained. His approval of Shackle’s asymmetric multiplier—different responses to rising and falling incomes—makes this a discriminating assessment of what expectations-based cycle theory promises and what it still needs to explain.

Written as Keynesian ascendancy pushed Austrian cycle theory to the margins, this reconstruction insists that its critics had mistaken its character: the theory is not a static contrast between saving and credit but a dynamic account of how investment reshapes the interdependence of industries over time. Its hinge is irreversibility—investment transforms fluid resources into specific, complementary capital that mistaken expectations can no longer unwind. Lachmann gives the theory a sectoral anatomy of consumers' goods, equipment, raw-material, and 'dynamic key' industries, and joins the Lundberg effect to the Ricardo effect to show how falling real wages during a boom divert entrepreneurs from long-period deepening toward speculation. Candid about limits, he finds the nineteenth-century railway booms fit the model but concedes that the 1929 crisis, with its stable prices and rising raw-material stocks, does not.

Once "free Capital" has been converted into buildings and machinery, any failure of events to conform to expectations will upset everything.

A factory’s book value can fall without its machinery disappearing; its output can rise simply because idle equipment returns to use. These distinctions drive Ludwig Lachmann’s critique of capital measurement in this 1941 article. Examining Colin Clark’s statistics, he argues that asset valuations and capital-output ratios can mistake disappointed expectations or changing utilisation for changes in productive resources. His alternative shifts attention from an aggregate capital stock to the services resources supply within coherent production plans, using adjusted depreciation allowances to measure productive consumption. The article offers a concrete way to investigate a persistent difficulty in quantitative economics: how to make accounting figures answer an economic question without confusing changes in value with changes in productive contribution.

A convincing account of a crisis need not rest on a convincing theory of economic change. In this review of Thomas Wilson’s Fluctuations in Income and Employment, Ludwig Lachmann praises much of the analysis of American fluctuations while challenging the theoretical synthesis behind it. His objections are concrete: raw-material shortages can interrupt expansion, industrial equipment differs in age and productivity, and expectations cannot simply be treated as given. These concerns sharpen his defence of Austrian cycle theory against what he regards as Wilson’s static assumptions. The review culminates in a question that reaches beyond their disagreement: if investment opportunities are exhausted, what explains the human effort through which new ones arise? Readers encounter a compact example of Lachmann testing economic explanation against changing resources and purposeful action.

How can economists measure the gains from technical progress when innovation changes the capital they are measuring? In this 1942 review of Spurgeon Bell’s Productivity, Wages, and National Income, Ludwig Lachmann welcomes evidence on American productivity and income distribution while challenging the accounting used to interpret it. He singles out Bell’s finding that, after 1933, productivity gains accrued to wage earners rather than consumers and profit recipients. His sharper objection concerns comparisons of capital across periods marked by idle capacity, asset write-downs, and machinery replaced before it wears out. This compact review shows why, for Lachmann, empirical detail and theoretical criticism belong together: a study can document technological change yet conceal its effects through the measures it employs.

What should a rigorous theory of competitive price explain—and where does clarity leave questions unresolved? In this brief 1943 review of George J. Stigler’s textbook, Ludwig M. Lachmann welcomes an exposition shaped by Frank Knight’s teaching, particularly its consistent treatment of costs as foregone alternatives. His praise makes the reservations revealing: expectations raise a problem of determinateness that Stigler scarcely recognises, while inventories unsettle the rigid distinction between short and long run without prompting a sufficiently developed analysis of time. Lachmann calls these minor defects, not grounds for rejecting the book. The review offers a compact view of his critical priorities: conceptual consistency deserves recognition, but expectations and time demand more than tidy exposition.

Can a critic of political myths remain captive to one himself? In this 1943 review of Gustav Stolper’s This Age of Fable, Ludwig M. Lachmann applauds an assault on economic and political formulas of both Right and Left, but challenges its picture of security before 1914. For Lachmann, nationalist agitation had already undermined Austria-Hungary and the precarious European balance: national self-determination belongs among the promises requiring scrutiny, not outside them. This brief review brings his conception of historical inquiry into focus—recovering human purposes and plans beneath inherited world-pictures—and shows how that standard turns admiration into a precise objection to Stolper’s historical frame.