In marketing circles, the old adage: "Half my advertising money is wasted. The problem is that I don’t know which half!" is often regarded as marketing fact and has been more or less accepted as fact until now. In a down economy marketers are now heralding this statement no longer as a quote, but as a mission statement to finding where to invest money. However, the very nature of this quote embodies the challenge that all marketers face: attribution. The famous marketing quote was reportedly said by William Lever, John Wanamaker, and F.W. Woolworth; begging the question: who gets the credit? Do we give credit to who said it first, said it last, or do we give credit to all equally?