This reference to the distinction of values between the short and the long term also refers to the theory of capital and interest that Eugen v. Böhm-Bawerk and Austrian and Swedish economists who followed him in such developments, such as Ludwig v. Mises, Knut Wicksell, the already named Friedrich Hayek, Ludwig Lachmann, or the British economist John Hicks. Current economic science recognizes the element of time preference in the interest rate, but emphasizes the predominance of the value of money as its main component. In contrast to this, the Austrian and Swedish economists referred to had emphasized a characteristic of homo economicus that brought them closer to the behavioral presuppositions of David Hume: agents prefer the same good in the present than in the future, or, expressed in other terms, for an individual to agree to defer the use of a present good towards a future time, such abstention from consumption must be compensated by an increase in the future value of such good. Thus, if a person lends a certain sum of money and therefore incurs an opportunity cost by abstaining from its consumption, it is because he expects to receive compensatory interest on his waiting in the future. Of course, Böhm-Bawerk’s theory of interest received its timely evaluation by numerous economists, pointing out its weaknesses and subsequent developments by his disciples met with mixed luck – to the point that, for example, Friedrich Hayek declared that he had never undertaken the task of writing the second part of his work The Pure Theory of Capital attentive to the extreme complexity of the theory of interest that inspired him. However, re-expressing David Hume’s legal-political theory in terms of the Austrian and Swedish theory of capital represents an intellectual exercise with a significant heuristic function.
In “natural” terms, an individual will “spontaneously” fulfill a promise if he calculates that the present value of breaching it is less than the future loss of credit with respect to his creditor or the community with which he habitually – a term proper to the Humean empiricism – it interacts. This is consistent with Hume’s own theory of empathy, according to which each individual can understand how his neighbor would feel and judge a certain situation, better if he is someone known than a complete stranger. Thus, the tendency to cheat is less corroborated with those who have the expectation of interacting more than those in whom the interaction will occur in a single play – as illustrated by the best known game theory.
We can thus see how, in the absence of the incentives provided by the coercive powers on the part of the state, the natural tendency to keep promises is better corroborated among acquaintances, with continuous interaction over time, than with strangers with what will have to be done. interact only once. This is what led David Hume, likewise, to reject any theory of the social contract – since, by definition, in the supposed state of nature there would be no one to guarantee its fulfillment – and to consider that, in a primitive stage of the individual and society, the primordial political unit would have to be the family – in fact, the very etymological meaning of this term conveys a “micro-political” connotation.
It will be later Adam Smith who will extend the foundation of a human interaction order beyond the nearby nuclei through his concept of “Great Society,” in which unknown subjects are capable of spontaneously coordinating their respective activities through the signals transmitted by the system. of prices, which indicates the relative modifications in the terms of exchange of complementary and substitute goods, contemporary or deferred in time. However, neither did Adam Smith deny a fundamental function that some mechanism must fulfill in order to emerge and sustain such an extended cooperation order: the application of the norms of peaceful coexistence, which guarantee stability in the possession of goods, the transfer by consent of said possession and the fulfillment of the contracts entered into for the purpose of perfecting said transfers.
Consequently, the problems of law enforcement, which concern the degree of effective compliance with the legal norms that condition human conduct, must represent a major chapter of the political philosophy and theory that characterizes legal institutions and policies as true incentive systems.