Purpose – Many service organisations seek to grow by selling additional different products to their existing customers. Many managers are evaluated on the level of customer loyalty in terms of cross‐product holdings – for example, the average number of bank products or insurance policies...

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...