The figure of the homo economicus is first used in economics as a model for building a truly mathematized ‘social physics’ in the 1890s, which is also the decade in which Freud laid the foundation of psychoanalysis. These may seem like coincident moments in the intellectual history of two disciplines, but I wonder… The marginalist ‘advance’ towards an economics that imitated the models of physics – that is, the breakthrough to the kind of ‘social physics’dreamt of by Bagehot - divorced value from production in order to grasp what, from the marginalist point of view, was the outstanding feature of the modern economy – the price system. It is a well known story: in economics, it is the age in which the insights of the classical economists were finally systematized as a science by leaving aside the labour theory of value. The theory, not being able to provide a direct explanation of prices, was, according to Jevons, Walras and Menger, incoherent. In its place, the marginalists advanced
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