"This paper was one of my digressions into abstract economics"

William Vickrey's quote suggests that he was discovering the field of abstract business economics in his paper. Abstract business economics is a branch of economics that concentrates on the academic aspects of the field, such as the advancement of economic models and also concepts. It stands out from applied business economics, which focuses on the functional application of financial concepts and also versions. By claiming that his paper was one of his digressions into abstract economics, Vickrey is indicating that he was checking out the academic aspects of business economics in his paper. This can suggest that he was creating a brand-new economic design or concept, or that he was discovering existing versions and theories in a new way. In either case, it is clear that Vickrey was participating in a deep expedition of the area of abstract economics in his paper.