MATHEMATICS IS THE LANTERN: VITO VOLTERRA, LEON WALRAS, AND IRVING FISHER ON THE MATHEMATIZATION OF ECONOMICS

The interdisciplinary project to unite the field of mathematics with the social and biological sciences marks the work of Vito Volterra, one of Italy's most prominent mathematicians of the twentieth century. This paper explores the connections between Volterra's 1901 inaugural address at the Accademia dei Lincei in Rome and the work of two of his contemporaries, Leon Walras and Irving Fisher. All three thinkers were ardent advocates of the mathematical turn in economic thinking. This paper argues, however that it is the previously unexplored relationship between Volterra and Fisher that sheds the most light on the way in which mechanical physics contributed to the project of mathematization within economics more generally. Furthermore, it explores the way in which mathematical inquiry postulated a new and coherent abstraction of the economy, at the same time that it gave epistemological authority to the economist.