Fighting Over the Millionaire Next Door.

In their recent bestseller, The Millionaire Next Door, authors Thomas Stanley and William Danko identify a class of millionaires that is nothing if not ordinary-so ordinary, in fact, that there appears to be no standard definition of this new breed of high-net-worth individual. Many tend to be cost-conscious and live modestly, making them hard to identify.

One thing is sure, however. These millionaires represent a lucrative source of business for the financial services industry. And their numbers are multiplying rapidly. According to a new study by the Boston-based con