In the booklet, The Federal Reserve System, Purposes & Functions, the Federal Reserve (or Fed) defines money as "Anything that serves as a generally accepted medium of exchange, a standard of value, and a means of saving or storing purchasing power. In the United States, currency (the bulk of which is Federal Reserve notes) and funds in checking and similar accounts at depository institutions are examples of money." In a barter economy, the buyer must offer real goods of the same value as the goods purchased. If the seller agrees to deliver the goods in exchange for a promise to receive equivalent value later, he has accepted an IOU. That IOU is a credit for the seller and a debt for the buyer. If the IOU is negotiable (if it can be used in exchange for goods sold by others) then the IOU is evidence of a monetary system. In essence, money is credit that is widely accepted as a medium of exchange.
For credit to be accepted as a medium of exchange, it must be seen as having some value. This doesn?t mean that money must have a constant fixed value. As long as it retains enough value to be widely accepted as a medium of exchange, it will qualify as money. Another function of money is as a means by which the value of one good or service is measured against the value of another. How many gallons of milk are worth a visit to the movie theater can only be determined in a
Cited: Schiller, Bradley R. _The Macro Economy Today_. 8th Edition. N.p.: McGraw-Hill, 2000. The Federal Reserve website ?The Federal Reserve System, Purposes & Functions? . Tresuary direct website http://www.publicdebt.treas.gov/sec/sectrdir.htm The Federal Reserve website Alan Greenspan Bio . About.com website ?Greenspans Briefcase? . Febuary 3, 2000 Fed101 website ?The federal reserver today? < http://www.kc.frb.org/fed101/indexflash.cfm>.