Business is war! Its leaders are strategic commanders, who boldly snatch victory from the jaws of defeat - and who perform other acts of derring-do. This kind of talk sounds great in the boardroom, and, for that matter, in the bookstore, where dozens of authors counsel would-be corporate warriors.

Anybody who can afford a box of business cards can afford a Web site. Any company with an 800 number can move its services to the Web for peanuts by comparison. The extreme case of corporate promotion is to strip away all other aspects of your business and sell goods or services via the Net alone, as amazon.com has done with books.

The whole hardware industry has experienced the phenomenon in which every time computers get cheaper, they appeal to a new set of users; every time they get more powerful, old customers upgrade.

Regardless of how it's done, transaction costs will continue to plummet as computers get more powerful. Low transaction costs are a wonderful thing if you're in the transaction business. They're wonderful for consumers too, making it cheaper and easier to buy things and creating new things to buy.

If you have two steaks, one that's an inch thick, one that's 2 inches thick, how much longer does the thicker one need to cook? It's four times as long. It goes roughly like the square. How come cookbooks don't tell you that?