2. Every month Yankee magazine includes a "Swop- per's [sic] Column" of offers to barter goods and services. Here is an example: "Will swop custom- designed wedding gown and up to 6 bridesmaids' gowns for 2 round-trip plane tickets and 3 nights' lodging in the countryside of England." Why would it be difficult to run our economy using a "Swopper's Column" instead of money? In light of your answer, why might the Yankee "Swopper's Column" exist?