The simple model of a bridge is great, and you could not build a bridge without understanding it well. But if you're actually building the bridge, you need to know the site. A lot of economics is like that: When prices go up, demand is gonna go down. You can't forget that and run your economy. But it's not the only thing you need to know.

Maybe we could think of science as being like a nuclear chain reaction in which people and ideas bounce off each other, and if critical mass is reached, a new field is formed.

I don't think I could have thought of any place other than Stanford to leave Harvard for.

It turns out that a Nobel is also followed by other recognitions, and perhaps the most unexpected of these is that the Japan Karate Association in Tokyo has now made me an honorary 7th-degree black belt, something that, given my athletic abilities, is even more unimaginable than being an Economic Sciences Laureate.