Such decisions intuitively grasp the need among all people to stratify themselves relative to their neighbors who live in close proximity.

FORBES: Why Consumers In Poor Countries Try Harder To 'Keep Up With The Joneses'

As I tried to show in my last column, as happens in every successful tech industry, the cloud computing industry has begun to stratify to offer different levels of service to different types of customers with different needs and price points.

FORBES: Rethinking the Cloud

By combining the Gleason score (determined by a pathologist examining cancer cells under a microscope), the clinical stage (determined by a careful prostate exam and various scans) and the PSA level, we can stratify patients into "low, " "intermediate" and "high" risk categories.

WSJ: Are PSA Tests a Good Idea for Screening Men for Prostate Cancer?