Der Ursprung des Kapitalzinses (1895)

Böhm-Bawerk’s controversy article on J. B. Clark, later joined to the 1900 preface of Einige strittige Fragen der Kapitalstheorie, is a compact defense of the Austrian theory of interest. It does not reopen the entire debate over Clark’s “permanent capital,” but corrects several readings of the Positive Theorie des Kapitales: the use of money examples, the relation to abstinence theory, the meaning of production periods, and the sense in which roundabout production is more “productive.”

The central correction is that Clark assimilates Böhm-Bawerk to a theory of rewarded waiting. Böhm-Bawerk explicitly rejects that moralized explanation:

Professor Clark scheint ferner meine Zinstheorie für eine Art Abstinenztheorie zu halten.

English translation: Professor Clark further seems to regard my theory of interest as a kind of abstinence theory.

Interest is not grounded in the capitalist’s pain, desert, or voluntary postponement of consumption. Its basis is the economic superiority of present goods over future goods under conditions where more productive methods require time. Roundabout production can yield more or better consumption goods, but only later; present goods therefore command a premium because they make it possible to bridge the interval.

Sondern meine Theorie knüpft lediglich an die objektive Tatsache an, daß gewisse ergiebige Produktionsmethoden „zeitraubend“ sind oder ein „Opfer an Zeit“ in dem Sinne erfordern (wie ich es auf S. 111 f. erläutert habe), daß sie „mehr oder bessere Genüßgüter aber erst in einem späteren Zeitpunkte“ liefern.

English translation: Rather, my theory ties in solely with the objective fact that certain productive methods are "time-consuming" or require a "sacrifice of time" in the sense (as I explained on pp. 111 f.) that they deliver "more or better consumption goods, but only at a later point in time."

This allows Böhm-Bawerk to accept that interest may exist in a stationary economy and is not created simply by new capital formation. Even without “true abstinence,” present command over goods remains economically preferable because it permits the use of longer and more advantageous production methods. The loan rate and the wage-product gap express this intertemporal valuation, not compensation for sacrifice.

A second clarification concerns Clark’s objection that if every tool is traced back through all its predecessors, production began with civilization and has no measurable end. Böhm-Bawerk answers that this confuses an absolute historical ancestry with the average interval relevant to capital theory. His concept measures the time between the application of original productive powers and the emergence of final consumption goods.

Man kann aber zweitens auch auf den Zeitraum sehen, „der durchschnittlich zwischen dem Aufwand der sukzessive in ein Werk verwendeten originären Produktivkräfte, Arbeit und Bodennutzungen, und der Fertigstellung der schließlichen Genußgüter vergeht“.

English translation: But secondly one can also look at the period of time "that elapses on average between the expenditure of the original productive powers—labor and uses of land—successively employed in a work, and the completion of the ultimate consumption goods."

The point is not the antiquity of capital’s lineage, but the period during which labor and land-services are economically tied up before yielding enjoyment. In this average sense, production periods can lengthen or shorten, and their length remains connected to the quantity of capital available.

Finally, Böhm-Bawerk turns Clark’s mill example against him. Clark treats equal returns on invested capital as equal productivity; Böhm-Bawerk means physical or technical productivity per unit of original factors. If a longer method yields the same annual financial return despite a longer investment interval, it must have produced more output per unit of labor or land-service.

Die letztere Supposition Professor Clarks, die er als gleiche „Ergiebigkeit der Produktion“ bezeichnet, involviert also notwendig eine ungleiche „Ergiebigkeit“ in meinem Sinne, und sein Beispiel enthält somit eher eine Bestätigung als eine Widerlegung meiner Annahme.

English translation: Professor Clark's latter supposition, which he designates as equal "productivity of production," thus necessarily involves an unequal "productivity" in my sense, and his example therefore contains a confirmation rather than a refutation of my assumption.

The appended preface presents such disputes as necessary illumination of capital theory’s foundations. The work’s importance lies in its distinctions: interest from abstinence, present from future goods, absolute from average production periods, and technical productivity from financial return. Böhm-Bawerk’s thesis is that capital interest originates in the market premium on present goods generated by time, scarcity, and the productivity of roundabout methods.