The archive.

A military supply operation can succeed without showing whether it could have used fewer resources or responded faster. In this 1955 article, revised and extended from a RAND memorandum, Oskar Morgenstern asks what must be understood before logistical performance can be judged or optimized. His economic and organizational perspective makes a shipment more than a quantity moved: personnel and machinery create continuing demands, complementary goods must arrive together, and requests may conceal inflated expectations. These dependencies make uniform cuts and rigid supply packages unreliable. Readers can discover why sources must exercise judgment rather than merely fill orders, and why military command needs broadly circulating information as well as directed instructions. Morgenstern’s proposed groundwork for theory exposes the practical choices hidden inside apparently straightforward calculations of requirements.

Schumpeter inspired lasting intellectual loyalty without founding a distinct school of economics. In this 1951 obituary, Oskar Morgenstern explores that contrast as both a former student and a critical fellow economist. He recalls the revelatory force of Schumpeter’s early theory while questioning the empirical conclusions of Business Cycles and the kind of capitalism whose demise Schumpeter predicted. Admiration sharpens rather than suspends his judgment: an economist receptive to new scientific methods remained attached to a vanished social world. The result is a compact portrait that helps readers distinguish Schumpeter’s theoretical achievements from his historical expectations—and understand how his generosity toward younger scholars fostered independent work rather than doctrinal allegiance.

What can an economic law establish if it cannot predict the size of a price change or settle the causes of a revolution? In this 1951 reply to Schuller, Murray N. Rothbard defends the certainty he attributes to praxeological deduction while sharply limiting its authority over particular events. His monetary examples make the distinction concrete: a law connecting money supply and purchasing power does not tell the historian whether its conditions held, or the forecaster whether they will persist. Readers can examine why Rothbard treats observed dollar shortages as illustrations rather than tests—and where that position places the burden of explanation. The reply offers a compact account of his methodological commitments without equating theoretical certainty with infallible historical or political judgment.

Praxeology is indispensable, but it does not provide omniscience. It furnishes laws in the form of: If X, and if Y remains unchanged, then Z.

Political enemies may disagree about who should govern while sharing assumptions about what government should control. In this brief preface to Socialism, first published in 1951 and reprinted here in 1962, Ludwig von Mises makes that provocative claim about Communists and their anti-Communist opponents. His criterion is who directs production: consumers through buying and abstaining from buying, or a central planning authority. He controversially groups welfare-state programmes with movements seeking comprehensive economic regimentation, treating their differences as secondary to the choice between socialism and the market economy. The preface offers a concentrated statement of the political stakes Mises assigns to economic organization—and a clear view of the polemical frame through which he asks readers to approach his larger book.

Strip profit and loss from the market, Mises argues, and production loses its only compass - the point this 1951 pamphlet drives home. Profit, he explains, is no arbitrary surcharge but the reward for anticipating future prices better than one's rivals and correcting the market's maladjustments, while loss is the penalty for judging wrong; under perfect foresight neither could exist. He then meets the moral condemnation of profit head on, rebutting the slogan of production for use and not for profit, the schemes to abolish or cap entrepreneurial gains, and the demand for equality, which he treats as envy in the guise of justice. The alternative to consumer-directed enterprise, he warns, is not a gentler middle way but socialism - and with it the erosion of representative government and civil liberty.

The consumers by their buying and abstention from buying elect the entrepreneurs in a daily repeated plebiscite as it were.

A firm, an army, a university, a logistics system: none can be understood as a mere sum of its inputs, because their capacities depend on arrangements of authority, information, timing, and control. Morgenstern's unfinished RAND memorandum clears the ground for a future quantitative theory of organization, arguing that economics has treated the firm as a black box and lacked even a descriptive language for what happens inside it. He builds one, distinguishing inner from outer activity, defining operations as chosen sequences of acts, and replacing organic metaphors with "competences," units delegated authority to set variables within domains. Signals activate them, memory sustains them, control counters the drift toward disorder. Written in 1951, the memorandum anticipates cybernetics, information theory, operations research, and bounded rationality, insisting that careful phenomenological description must precede any premature axiomatization.

Organization in itself, wherever it occurs, whether in social or natural life, is something exceptional and extraordinary.

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.

Economic theory can become more ambitious without becoming more securely tested. That tension runs through Emil Kauder’s 1951 assessment of American economics since Keynes’s General Theory. He identifies two distinct innovations: aggregate analysis, which allows equilibrium to coexist with unemployment, and strategic price theory, in which a firm’s choices depend on its rivals’ responses. Neither amounts, in his account, to a settled replacement for older economics. Kauder weighs their explanatory promise against unstable assumptions, disputed measurements, and the influence of legal and moral conventions on market outcomes. His perspective as a historian of economic thought makes this more than a report on competing schools: readers can see why conceptual novelty, empirical adequacy, and intellectual victory need not coincide.

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.

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.

Can an economy suffer inflation before it reaches full employment? In this 1951 report on the Verein für Sozialpolitik’s conference, Hans Bayer makes Germany’s reconstruction problems a test of Keynesian policy: displaced workers and regional unemployment coexist with scarce productive capacity and entrepreneurs willing to invest. Electricity supply offers a concrete example of why increased demand might raise prices without creating enough jobs. Bayer’s commentary moves beyond reporting the proceedings to argue that employment policy must address production bottlenecks, sectoral coordination, and income distribution. Yet his criticism of Keynes does not lead him to endorse unrestricted markets. The article lets readers examine a specific alternative in the reconstruction debate: public coordination that treats full employment as a consequence of sound production and income arrangements, rather than a sufficient goal in itself.

Can the pursuit of emancipation dissolve the institutions that make personal freedom possible? In this 1951 article, Wilhelm Röpke challenges liberals to examine not only collectivist policies but the emotional allegiances that make them attractive. He interprets progressivism as a secular creed whose promises of equality and mastery can encourage submission to centralized power. His sharpest institutional argument concerns families, property, inheritance, and local or voluntary associations: equalizing individuals may weaken the independent groups that protect them from the state. While acknowledging legitimate demands for justice, Röpke questions even equality of opportunity when it requires continuous administrative intervention. The article offers a deliberately contentious test for reform: what happens to liberty when measurable gains in equality come at the expense of social independence?