If the American government can't stand behind the dollar, the world's benchmark currency, then the global financial system will very likely enter a new era in which there is much less trade and much less economic growth. It would be, by most accounts, the largest self-imposed financial disaster in history.

When you see a merger between two giants in a declining industry, it can look like the financial version of a couple having a baby to save a marriage.

If the American government can't stand behind the dollar, the world's benchmark currency, then the global financial system will very likely enter a new era in which there is much less trade and much less economic growth. It would be, by most accounts, the largest self-imposed financial disaster in history.

I don't think that much change comes from economists. I think it comes more from political realities. Probably the two giants of the 20th century, who actually did shift government policy in the U.S. and around the world, were John Maynard Keynes and Milton Friedman. I don't see anybody in our system who is at that level of influence.

Happiness quantification sounds a bit wishy-washy, sure, and through a series of carefully administered surveys across the globe, economists and psychologists have certainly confronted a fair number of sticky issues around how to measure, and even define, happiness.