As I noted in my Nobel lecture, an early insight in my work on the economics of information concerned the problem of appropriability - the difficulty that those who pay for information have in getting returns.

I recognized that information was, in many respects, like a public good, and it was this insight that made it clear to me that it was unlikely that the private market would provide efficient resource allocations whenever information was endogenous.

My teachers helped guide and motivate me; but the responsibility of learning was left with me, an approach to learning which was later reinforced by my experiences at Amherst.

If Trump actually wants to help those who have been left behind, he must go beyond the ideological battles of the past.

With no education, you have neocolonialism instead of colonialism, like you've got in Africa now and like you've got in Haiti. So what we're talking about is there has to be an educational program. That's very important.

As I got older, I realised that people saw me as other things - sometimes Korean, sometimes Japanese, sometimes just Asian. When my family moved to a more affluent white neighbourhood, I started to see myself as 'other', this amorphous category. I didn't even know what 'not other' was, but I knew I wasn't it; I wasn't what was normal.

Everyone has a responsibility towards this larger family of man, but especially if you're privileged, that increases your responsibility.

Let's talk about after-school programs generally. They're supposed to be educational programs, right? And that's what they're supposed to do; they're supposed to help kids who can't - who don't get fed at home, get fed so that they do better at school. Guess what? There's no demonstrable evidence they're actually doing that.