The $509.1 million impact represents the B.A.A.'s operational costs, spending by marathon participants and spectators, and other secondary economic impacts from household spending, taxes and vendor spending. For this report, the Donahue Institute examined the two categories of expenditures of the B.A.A. – year-round operations and a larger set of spending associated with marathon weekend. "The Boston Marathon is more than just a race; it's a powerful driver that shines a spotlight on the Greater Boston area ...