Ludwig von Mises and Friedrich von Hayek: The Modern Extension of Austrian Subjectivism

Kirzner’s chapter reconstructs the twentieth-century Austrian tradition through the linked significance of Ludwig von Mises and Friedrich A. Hayek. Its opening problem is historiographical: shared opposition to socialism, shared work on capital and cycles, and shared marginalization from postwar formalism do not by themselves make Hayek a simple continuation of Mises.

But for historians of the Austrian School of economics these common positions seem not sufficient to justify treating Hayek’s economics as a seamless further development of Misesian economics.

Kirzner’s answer is that their connection lies in the modern deepening of Austrian subjectivism. This is not merely the claim that value is subjective, but a broader view of action in which purposes, expectations, imagined futures, and dispersed knowledge matter. He contrasts a static subjectivism, compatible with equilibrium allocation and given preference rankings, with a dynamic subjectivism in which choice is open-ended and creative.

This view of the subjective character of human choice is contrasted sharply with that other ('static') level of subjectivist analysis in which the creativity and inherent indeterminacy of decision making is, at least tacitly, suppressed.

The critique of Robbins is central. Robbins helped translate Austrian insights into the neoclassical language of scarce means and ranked ends, but his economizing agent still solves a pre-given maximization problem. Kirzner argues that such a model cannot explain how actors come to notice possibilities, revise plans, or discover the relevant ends-means framework in the first place.

His imagination of these alternative futures is very much an intrinsic element of choice.

Mises supplies the first major correction by replacing mere economizing with purposive human action. On Kirzner’s reading, Mises restores futurity, uncertainty, and entrepreneurial discovery to economic theory. The actor is not a passive calculator of known data but a purposive agent who appraises situations, imagines improvement, and acts under uncertainty. This makes market process intelligible as a sequence of discoveries rather than a static allocation of already known resources.

Now, in the market economy, neither the ranking of ends nor the availability of means can be considered as given to any agent apart from the decisions of other (similarly ‘economizing’) individuals.

Hayek then supplies the complementary knowledge dimension. His decisive contribution is not Misesian apriorism, which he did not share, but the analysis of equilibrium as mutual compatibility of plans and of markets as procedures for communicating dispersed, tacit, and changing knowledge. In this sense, Hayek extends subjectivism from wants and valuations to beliefs, expectations, and social coordination.

It was Hayek’s contribution to a deepened subjectivism that brought this role into unmistakably clear focus.

Kirzner’s synthesis is that Mises gives Austrian economics the entrepreneurial actor, while Hayek gives it the social problem of knowledge that makes entrepreneurial discovery necessary. Together they provide an alternative to both mechanical equilibrium theory and radical indeterminism: markets are fallible and time-bound, yet not chaotic, because profit-seeking alertness tends to reveal errors and coordinate plans. The chapter therefore justifies treating Mises and Hayek as a linked pair without erasing their methodological differences. Their shared importance lies in carrying Austrian subjectivism beyond given preferences and toward a theory of action, learning, ignorance, and market discovery.