One of the handiest concepts for understanding how cities develop is the notion of "clustering," developed by Harvard business professor Michael Porter. Simple concept: It holds that, in some highly developed industries, leading practitioners need to be near one another, even when logic and high land costs might suggest that it's better to disperse.

Mike Huckabee, the governor of Arkansas, is as amiable a fellow as most governors, and normally spends a good deal of his time traveling around the state and mixing with his constituents.

Protecting network systems against virus attacks takes good management--and a little bit of luck.

Fuzzy language is a big impediment to good management--and to understanding the way government really works.

Several health insurance companies have stepped up to say they intend to promote universal health care coverage.