books.google.com - Why do our headaches persist after we take a one-cent aspirin but disappear when we take a fifty-cent aspirin? Why do we splurge on a lavish meal but cut coupons to save twenty-five cents on a can of soup? When it comes to making decisions in our lives, we think we're making smart, rational choices....http://books.google.com/books/about/Predictably_Irrational_Revised_and_Expan.html?id=ro7X8HRyuEIC&utm_source=gb-gplus-sharePredictably Irrational, Revised and Expanded Edition