Ludwig M. Lachmann, 1906-1990

Kirzner’s file is a short obituary and intellectual memorial. Its scope is deliberately selective: a compressed biography of Ludwig M. Lachmann gives way to an interpretation of his place in the revival of Austrian economics. Kirzner’s main thesis is that Lachmann’s enduring importance lies in his radicalization of subjectivism—his insistence that economics must take seriously not only subjective valuations but also interpretation, time, mutable knowledge, and divergent expectations.

The central thread running through Lachmann's work is, unquestionably, his radical subjectivism—his conviction that economic understanding calls for recognition, not merely that external events influence human action only as they have been filtered through the human mind, but also that each human mind is active and idiosyncratic in interpreting external events and in thus arriving at what it knows and what it expects.

The essay’s structure follows from this claim. Kirzner first situates Lachmann biographically: Berlin and Zurich, exile to England in 1933, research under Hayek at the London School of Economics, the chair at Witwatersrand, and later years at New York University’s Austrian Economics Program. But the biography is mainly a frame for intellectual character. Kirzner writes as an admirer and friend, while acknowledging that he and Lachmann had long disagreed on fundamental issues. This gives the memorial its distinctive tone: affectionate, provisional, and analytically serious.

Kirzner’s central conceptual move is to present Lachmann’s career as a movement from Misesian praxeology toward a more radical subjectivism associated with Shackle. Lachmann did not abandon Austrian economics, but he came to see Mises and Hayek as insufficiently subjectivist where expectations were concerned.

In fact there seems to have occurred a steady deepening, or radicalization, of Lachmann's subjectivism during the last 40 years of his life.

The decisive issue is expectations. For Lachmann, economic action unfolds in time, and once time is admitted, knowledge changes. Expectations therefore cannot be treated as mechanical responses to external data or as variables tending naturally toward equilibrium. This is the point at which Lachmann’s subjectivism becomes a challenge to deterministic models of market order.

The major shortcoming in the Austrian literature, Lachmann maintained, was its failure to extend subjectivism to encompass expectations.

Kirzner interprets Lachmann’s admiration for Shackle through this lens. Shackle supplied, for Lachmann, the missing extension of subjectivism into imagined futures. The result was an economics of open-ended human action, one that some critics feared might approach nihilism but that Kirzner presents as the product of uncompromising intellectual honesty.

It was Shackle’s great virtue, in Lachmann’s eyes, that, by underscoring the subjectivism of expectations, he decisively unmoored human action from any deterministic constraints imposed by external events.

Yet Kirzner resists portraying Lachmann as simply anti-Austrian. Lachmann’s disagreements with Mises and Hayek did not diminish his respect for them, and his practical intellectual home remained the Austrian revival. What united him with that movement was opposition to late twentieth-century economics dominated by deterministic, mechanical general-equilibrium models.

Despite his differences with the Austrians, it should be emphasized that his enormous personal and professional admiration and respect for both Mises and Hayek were never in question.

The memorial’s relevance lies in its account of Lachmann as both theorist and teacher. Kirzner emphasizes his role in forming younger Austrian scholars such as Gerald O’Driscoll, Mario Rizzo, Don Lavoie, and Stephan Boehm. Lachmann’s legacy was not only a doctrine but a sensibility: suspicion of closed systems, attention to interpretation, and insistence that economic coordination must be understood through processes of human meaning-making.

The closing tribute preserves the tension in Lachmann’s work. Kirzner suggests that even if Lachmann did not always stress market coordination as Kirzner would, his subjectivism deepened the understanding of how market society can foster it. The essay thus presents Lachmann as a radical critic of equilibrium determinism and, paradoxically, as a major contributor to Austrian market-process thought.

We have lost a delightful, encyclopedic colleague who told us the truth with white hot passion discreetly clothed in the most elegant old-world courtesy.