Political risk is hard to manage because so much comes down to the personal choices of policymakers, whether prime ministers or heads of central banks.

The typical American corporation is a shareholders' republic the same way that China is a peoples' republic.

In industries where a lot of competitors are selling the same product - mangoes, gasoline, DVD players - price is the easiest way to distinguish yourself. The hope is that if you cut prices enough you can increase your market share, and even your profits. But this works only if your competitors won't, or can't, follow suit.

Now, modern economies have a very effective mechanism for deciding if salaries are really too high: it's called the free market. That's how most people's salaries are set, after all, including those of major-league baseball players and European soccer players.

No decision-making system is going to guarantee corporate success. The strategic decisions that corporations have to make are of mind-numbing complexity. But we know that the more power you give a single individual in the face of complexity and uncertainty, the more likely it is that bad decisions will get made.

The value of a currency is, ultimately, what someone will give you for it - whether in food, fuel, assets, or labor. And that's always and everywhere a subjective decision.

Linux is a complex example of the wisdom of crowds. It's a good example in the sense that it shows you can set people to work in a decentralized way - that is, without anyone really directing their efforts in a particular direction - and still trust that they're going to come up with good answers.