[It's also still difficult to identify the multiple relationships

you might have with a customer. Few companies are able

to confirm that customers who respond to marketing online

and customers who physically buy products through retail

outlets might be the same people, for example.] Not many

companies know that Joe who visited the company Web

site is the same Joe who visited the store and bought goods

at point-of-sale, ... For the tools to be really

effective, companies need to look at customer data from all

perspectives.

Michael Bernstein