Why We Buy: The Science of Shopping--Updated and Revised for the Internet, the Global Consumer, and Beyond.
That will be coming in a few days.
Today, I have for you a quick, a newly practical musical model entitled, The Convergence Concept. (See the “5 Questions for Paco” video at http://pacounderhill.com/news/)
In my visual aid teaching, this model form is called Venn Circles.