1. Advertising Age (2003), “McDonald’s tests ads that focus on service”, Advertising Age, January 6.
2. Business Week Online (2002), “Starbucks’ card smarts”, Business Week Online, March 18.
3. New York Times (2003), “Amazon tries word of mouth”, New York Times, February 10.
4. Seattle Post‐Intelligencer (2003), “Starbucks sales increase 7 percent in stores open more than a year”, Seattle Post‐Intelligencer, January 3.