Popular as Keynesian fiscal policy may be, many economists are skeptical that it works. They argue that fine-tuning the economy is a virtually impossible task, and that fiscal-stimulus programs are usually too small, and arrive too late, to make a difference.

I do think to some extent multitasking is a way of fooling ourselves that we're being exceptionally efficient.

Markets work best when there's lots of information available and a historical track record to go on; they excel at predicting things like horse races, election outcomes, and box-office results. But they're bad at predicting things like who will be the next Supreme Court nominee, as that depends on the whim of the president.

The paradox of Steve Jobs's career is that he had no interest in listening to consumers - he was famously dismissive of market research - yet nonetheless had an amazing sense of what consumers actually wanted.

You can't fuel real economic growth with indiscriminate credit. You can only fuel it with well-allocated, long-term investment.

There does seem to be some evidence that as people get older, they procrastinate less, perhaps because they feel the pressure of time more.

The business of America shouldn't be subsidizing business.