I recently posted a Letter to the Editor at www.Early-Retirement-Planning-Insights.com site entitled Michael is Asking Cutting-Edge Questions.
Juicy Excerpt: As we move deeper into a Rational Investing analysis (it is rational to accept that emotions matter), we will be confronting more and more questions that are more psychological than statistical in nature (but in many cases looking at the data will help us come to a better informed understanding of psychological realities). We need to become more comfortable mixing the two types of analysis (statistical and psychological). The rules for analysis with the two types of questions are generally very different. That at times makes it hard to know how to proceed and how to state things properly.