Loss aversion is a really disproportionate anxiety about stuff that doesn't matter very much. So for instance, if you lose $5, you feel really bad about the $5 you've lost. You're cursing yourself. You're going through it again and again. If, on the other hand, you find $5, you go - hey, great, five bucks. And you've forgotten about it really quickly.

Synthetic Worlds is a surprisingly profound book about the social, political, and economic issues arising from the emergence of vast multiplayer games on the Internet. What Castronova has realized is that these games, where players contribute considerable labor in exchange for things they value, are not merely like real economies, they are real economies, displaying inflation, fraud, Chinese sweatshops, and some surprising in-game innovations.

There's nothing wrong with a plan, but remember Von Moltke's famous dictum that no plan survives first contact with the enemy. The danger is a plan that seduces us into thinking failure is impossible and adaptation is unnecessary - a kind of ‘Titanic' plan, unsinkable (until it hits the iceberg).

Ten percent of American businesses disappear every year. ... It's far higher than the failure rate of, say, Americans. Ten percent of Americans don't disappear every year. Which leads us to conclude American businesses fail faster than Americans, and therefore American businesses are evolving faster than Americans.

I see the God complex around me all the time in my fellow economists. I see it in our business leaders. I see it in the politicians we vote for - people who, in the face of an incredibly complicated world, are nevertheless absolutely convinced that they understand the way that the world works.

A lot of international companies invest in the U.K. as a base for doing business with the rest of the European Union.

Economics spreads happiness.