Corporations go through cycles of growth and retrenching, what I call corporate yo-yo dieting. Companies that expand continually are companies that grow fat. Then they’re forced to diet, or downsize in “corp” speak, until they can grow again and reengineer (a new body in ninety days!), merge and acquire other companies (weightlifting and muscle training) until the cycle starts anew, and they’re forced to reduce again (lose twenty pounds in six weeks!).