We confirm our 2007 conclusions concerning the Pareto Law. Our conclusions are now supported by many other data sets, and independent analyses.It's wrong to talk about an 80/20 law in marketing. A brand's heaviest 20% of buyers generally contribute not much more than half of a brand's sales, and...

The concept of competitive advantage is argued to be not very useful to managers. At best it is an aspirational goal. Books that claim to present a route to competitive advantage give false hope – multiple competing firms in an industry cannot (each) realistically set out to build a...