On the simplest level, telecommuting makes it harder for people to have the kinds of informal interactions that are crucial to the way knowledge moves through an organization. The role that hallway chat plays in driving new ideas has become a cliche of business writing, but that doesn't make it less true.

There are certainly valid reasons for taking a company private, and it's also possible that C.E.O.s perform better when monitored by a small number of owners in a private company rather than by the dispersed and often uninterested shareholders of a public corporation.

The smartest groups, then, are made up of people with diverse perspectives who are able to stay independent of each other.

Discussions of health care in the U.S. usually focus on insurance companies, but, whatever their problems, they're not the main driver of health-care inflation: providers are.

What an economy really wants, after all, is not more investment per se but better investment. It wants capital to flow to companies that will create value - not in the form of a rising stock price but in the form of more goods for less cost, more jobs, and rising wages - by enhancing productivity.

The financial crisis of 2008 was not caused by investment banks betting against the housing market in 2007. It was caused by the fact that too few investors - including all of the big investment banks - bet too heavily on the housing market in the years before 2007.

Movies' mistrust of capitalism is almost as old as the medium itself.