Title: Influence Of Modelling Consistently Rational Agents On Neoclassic Economics
Abstract: This article studies the evolution of the concept of rationality of the choice and decision theory within neoclassic economics during the 20-th century. The main idea is that diminishing the economic agent significance to a consistent degree was implemented by revealed preferences theory of Samuelson and expected utility theory of Savage. Formal characterization, generalization, and refinement of the rationality concept were carried out by such economists as Samuelson, Debreu, and Savage, whose works put an end to the recognition of Nash equilibrium as a characteristic of rational behaviour. The object of research in this article is the historical approach to the understanding of rationality in the twentieth century, with the help of which a conscious paradigm shift took place in the traditional maximization understanding. Rationality is one of the many available higher-order alternatives that has a specific preference relation, formed from a deep study of rationality properties. Because of the simultaneous emergence of tools for analyzing the system of relations in the Bayesian solution theory, the mathematical method in economics is associated with mathematical topology, set theory and axiomatization. Formally, there was a revolution in the economy, but the main subject of the study dropped out of neoclassic analysis, i.e. the price, which now began to be set only on an individual basis.